Watch for calculating photographic exposure and storage medium

Abstract

A watch for calculating photographic exposure and a storage medium are disclosed in which the watch provides a method of calculating an appropriate camera shutter speed and aperture setting at a given ISO speed setting to obtain settings that would result in an appropriate photographic exposure when input into a camera in the watch. The equipment provided by the invention provides a simple, quick and convenient method for calculating the proper setting of each constituent part of the photographic exposure triangle.

Description

Technical Field

[0001] The present invention generally relates to a wearable device, and more particularly to a watch for calculating photographic exposure, which provides a quick and easy way to calculate the appropriate camera shutter speed and aperture settings for a given ISO speed setting to obtain settings that will result in proper photographic exposure when input into a camera. Background Art

[0002] The relationship between ISO speed, aperture, and shutter speed, known as the "exposure triangle," is fundamental to the world of photography. Exposure is a key factor in determining what is actually recorded on a camera's film or other image sensor (e.g., an electronic sensor).

[0003] Cameras typically provide adjustable settings for the three components of the exposure triangle. The ISO speed setting (commonly referred to as the "ISO speed" setting, where ISO stands for the International Organization for Standardization, which standardizes the sensitivity of a camera sensor to light) controls the sensitivity of the camera sensor to light. Generally, each value represents a change in one stop of light, and each incremental ISO speed represents a doubling or halving of the sensor's sensitivity to light. For example, when the ISO speed is set to 100, the camera sensor is half as sensitive as when the ISO is set to 200. The lower the ISO speed setting, the lower the sensitivity of the image sensor, and thus the smoother the image because there is less noise in the image.

[0004] The "aperture" of a camera lens refers to the size of the opening in the lens aperture blades, which determines the amount of focused light passing through the lens. Aperture settings are typically designated as "f-numbers." Small f-numbers such as f / 2 have relatively large openings and allow a large amount of light to pass through even in a short period of time. Larger f-number settings, such as f / 22, make the opening smaller and allow less light to pass through the lens over a period of time. A larger aperture (i.e., a smaller f-number) generally results in a shallower depth of focus compared to a smaller aperture (i.e., a larger f-number). Aperture settings are typically calibrated so that when two lenses are set at the same shutter speed (e.g., 1 / 125 second), the same amount of light passes through lenses with 35mm and 100mm focal lengths.

[0005] The third component of the "exposure triangle" is the shutter speed, which determines the length of time that light passes through the lens and strikes the image sensor or film plane. Shutter speed is typically measured as a fraction of a second and is usually displayed on a camera as the reciprocal of the shutter opening time (e.g., the shutter speed "125" typically means the shutter is open for 1 / 125 second for each exposure). Adjusting the shutter speed can change the way dynamic objects are captured in a photographic image. If the shutter speed is faster than the speed of movement of an object or the background, the image will be sharp. But if the shutter speed is slower than the movement of the object or background, the object will appear blurred in the image.

[0006] Photographers typically want to set one element of the exposure triangle to achieve the desired effect (e.g., set a fast shutter speed to capture a sharp image of a fast-moving object or set a small f-number to obtain a shallow depth of focus). To obtain the correct exposure when using the desired settings, the photographer must calculate the appropriate values of the other two elements of the exposure triangle. This calculation typically requires referring to a chart, e.g., a chart showing the relationships between various values of the exposure triangle settings. Looking up values in a chart or other external reference can be time-consuming and requires the photographer to have such a chart or other reference materials.

[0007] In view of the above problems, there is a need for a simple, fast, and convenient method for calculating the appropriate settings of the exposure triangle components to obtain proper photographic exposure. The present invention meets this need and other needs. SUMMARY OF THE INVENTION

[0008] In some embodiments, the present invention provides a watch for calculating photographic exposure. Such a watch may include a watch case; a dial disposed within the watch case and visible through an opening in the watch case. The dial may include a plurality of markings corresponding to camera aperture values; and a first ISO speed reference indicator corresponding to a first ISO speed setting. The watch may further include a rotatable bezel attached to the watch case such that the bezel is axially rotatable about the dial. The rotatable bezel may include an aperture reference indicator; and a set of markings corresponding to camera shutter speed values, wherein the aperture values, shutter speed values, aperture reference indicator, and first ISO speed reference indicator are arranged such that when the rotatable bezel is rotated so that the aperture reference indicator on the bezel is adjacent to a particular aperture value on the dial, the first ISO speed reference indicator on the dial is located next to the shutter speed value indicated on the rotatable bezel. Thus, when the camera is set to the indicated shutter speed value, the particular aperture value, and the first ISO speed setting, the photograph taken by the camera will have proper exposure.

[0009] In some embodiments, the plurality of markings corresponding to camera aperture values may include one or more full-stop, half-stop, and one-third-stop values. In a particular embodiment, the plurality of markings corresponding to camera aperture values includes two or more values selected from the group consisting of 0.95, 1, 1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22, 32, 45, and 95. These numbers correspond to the aperture values of F0.95, F1, F1.4, F2, F2.8, F4, F5.6, F8, F11, F16, F22, F32, F45, and F95, respectively.

[0010] In some embodiments, the first set of markings corresponding to camera shutter speed values includes two or more values selected from the group consisting of 32,000, 16,000, 8,000, 4,000, 2,000, 1,000, 500, 250, 125, 60, 30, 15, 8, 4, 2, 1, 2, 4, 8, 15, 30, and 60. In some embodiments, the first ISO speed setting is selected from the group consisting of ISO 3, 8, 12, 25, 50, 100, 200, 400, 800, 1,600, 3,200, 6,400, 12,800, 25,600, 51,200, 102,400, 204,800, 409,600, 819,200, 1,638,400, and 3,276,800.

[0011] In some embodiments of the present invention, the watch includes a rotatable bezel, and the bezel further includes a second set of markings corresponding to camera shutter speed values; the dial further includes a second ISO speed reference indicator corresponding to the second ISO speed setting. The second ISO speed reference indicator and the second set of camera shutter speed values are arranged such that when the bezel is rotated so that the aperture reference indicator is on the bezel and adjacent to a specific aperture value on the dial, the second ISO speed reference indicator on the dial is next to the second indicated shutter speed value among the second set of camera shutter speed values on the rotatable bezel. At this time, if the second indicated shutter speed, the specific aperture value, and the second ISO speed setting are set in the camera, the photo taken by the camera will have proper exposure. The second ISO speed setting is generally different from the first ISO speed setting and is selected from the group consisting of ISO 3, 8, 12, 25, 50, 100, 200, 400, 800, 1600, 3200, 6400, 12,800, 25,600, 51,200, 102,400, 204,800, 409,600, 819,200, 1,638,400, and 3,276,800. The second set of markings corresponding to camera shutter speed values includes two or more values selected from the group consisting of 8000, 4000, 2000, 1000, 500, 250, 125, 60, 30, 15, 8, 4, 2, 1, 2, 4, 8, 15, 30, and 60.

[0012] In some embodiments, the present invention provides a watch for calculating photographic exposure, the watch including a watch case, a watch dial placed in the watch case (the watch dial being visible through an opening of the watch case), and a rotatable bezel attached to the watch case such that the bezel can rotate axially around the watch dial. These embodiments can have at least two different marker layouts on the rotatable bezel and the watch dial. In one of these layouts, the watch dial can include a plurality of markers corresponding to camera aperture values and at least one first ISO speed reference indicator corresponding to a first ISO speed setting, while the rotatable bezel includes an aperture reference indicator and at least one set of markers corresponding to camera shutter speed values. In another layout, the marker positions of the watch dial and the rotatable bezel are interchanged, such that the watch dial includes an aperture reference indicator and at least one set of markers corresponding to camera shutter speed values; and the rotatable bezel includes a plurality of markers corresponding to camera aperture values and at least one first ISO speed reference indicator corresponding to a first ISO speed setting. In either layout, the aperture values, shutter speed values, aperture reference indicator, and first ISO speed reference indicator are arranged such that when the rotatable bezel is rotated to bring the aperture reference indicator adjacent to a specific aperture value, the first ISO speed reference indicator is adjacent to a indicated shutter speed value, wherein when the camera is set to the indicated shutter speed value, the specific aperture value, and the first ISO speed setting, the photograph taken by the camera will have proper exposure.

[0013] As an example, when the camera aperture values and ISO speed reference indicator are on the watch dial, and the aperture reference indicator and camera shutter speed values are on the rotatable bezel, and the bezel is rotated so that the aperture reference indicator on the bezel is adjacent to a specific aperture value on the watch dial, the ISO speed reference indicator on the watch dial will be adjacent to an indicated shutter speed value on the rotatable bezel.

[0014] Similarly, as another example, when the camera aperture values and ISO speed reference indicator are on the rotatable bezel, and the aperture reference indicator and camera shutter speed values are on the watch dial, and the bezel is rotated so that the aperture reference indicator on the watch dial is adjacent to a specific aperture value on the rotatable bezel, the ISO speed reference indicator on the rotatable bezel will be adjacent to an indicated shutter speed value on the watch dial.

[0015] In some embodiments, the present invention provides a watch having multiple sets of markings for one or more camera aperture values, an ISO speed reference indicator, a camera shutter speed value, and an aperture reference indicator. For example, the watch provided by the present invention may be: (a) a watch face including a plurality of markings corresponding to camera aperture values, a first ISO speed reference indicator corresponding to a first ISO speed setting; and at least a second ISO speed reference indicator corresponding to a second ISO speed setting, and a rotatable bezel including an aperture reference indicator and a first set of markings corresponding to a first set of camera shutter speed values; or (b) a watch face including an aperture reference indicator, a first set of markings corresponding to a first set of camera shutter speed values, and at least a second set of markings corresponding to a second set of camera shutter speed values, and a rotatable bezel including a plurality of markings corresponding to camera aperture values, a first ISO speed reference indicator corresponding to a first ISO speed setting, and at least a second ISO speed reference indicator corresponding to a second ISO speed setting. In these embodiments, the markings corresponding to the aperture value, the shutter speed value, the aperture reference indicator, and the first ISO speed reference indicator are arranged such that when the bezel is rotated so that the aperture reference indicator is adjacent to a particular aperture value, the first ISO speed reference indicator is adjacent to an indicated shutter speed value, and at this time, if the indicated shutter speed value, the particular aperture value, and the first ISO speed setting are set in the camera, the photo taken by the camera will have proper exposure. The second ISO speed reference indicator and the second set of markings corresponding to the second set of camera shutter speed values are arranged such that when the bezel is rotated so that the aperture reference indicator is adjacent to a particular aperture value, the second ISO speed reference indicator is next to a second indicated shutter speed value in the second set of camera shutter speed values, and at this time, if the second indicated shutter speed, the particular aperture value, and the second ISO speed setting are set in the camera, the photo taken by the camera will also have proper exposure.

[0016] In some embodiments, the watch of the present invention includes a set of camera shutter speed values applicable to a first ISO speed, where the first set includes a plurality of markings corresponding to camera shutter speed values under a first lighting condition, and a plurality of markings corresponding to camera shutter speed values under a second set of lighting conditions. In these embodiments, both the first set of camera shutter speed values and the second set of camera shutter speed values are typically located on a rotatable bezel or both are located on the dial. The first set of camera shutter speed values and the second set of camera shutter speed values are arranged such that when the bezel is rotated to align the aperture reference indicator adjacent to a specific aperture value, the first ISO speed reference indicator aligns with a shutter speed value indicated by one of the first set of camera shutter speed values and a second shutter speed value indicated by the second set of camera shutter speed values. When the camera is set with the shutter speed indicated by the first set, the specific aperture value, and the first ISO speed setting, the photo taken by the camera will have proper exposure under the first lighting condition; and when set with the shutter speed indicated by the second set, the specific aperture value, and the first ISO speed setting, the photo taken by the camera will have proper exposure under the second lighting condition. In some embodiments, the first lighting condition is typical sunny-day light. In some embodiments, the first or second lighting condition is typical overcast-day light.

[0017] In some embodiments, the watch of the present invention may further include a light-measuring device capable of measuring the lighting condition to which the measuring device is exposed. A central processing unit (CPU) is configured to adjust one or more ISO speed settings, aperture values, and shutter speeds based on the light measurement to provide settings that, when used to adjust the settings on the camera, will cause the photo taken by the camera to have proper exposure in ambient light. In some embodiments, the ISO speed settings, aperture values, and shutter speeds (including both light-adjusted and unadjusted readings) are all displayed on the dial.

[0018] In some embodiments, the present invention provides watches for calculating photographic exposure that include an electronic display, and the dial is displayed on the electronic display. These watches may include a central processing unit (CPU) configured to execute stored instructions, a storage device containing stored instructions executable by the CPU, where the stored instructions include display instructions for rendering dial markings on the electronic display, a user interface configured to enable a user to select a set of stored instructions executable by the CPU; and a display interface for transmitting the display instructions executed by the CPU to the display screen, where the display instructions include instructions for displaying a plurality of markings corresponding to aperture values and ISO speed reference indicators on the dial. In alternative embodiments, the aperture reference indicator and a plurality of markings corresponding to a set of camera shutter speed values are displayed on the dial.

[0019] The storage instructions of the electronic display watch of the present invention, in some embodiments, may include one or more ISO speed settings, wherein when a user selects a specific ISO speed setting using the user interface, the display instructions cause: a) an ISO speed reference indicator of the selected ISO speed setting to be displayed on the dial, and b) the positions of a plurality of aperture values to be positioned on the dial such that when the bezel is rotated to place the aperture reference indicator adjacent to a specific camera aperture value on the dial, the ISO speed reference indicator is positioned adjacent to an indicated shutter speed value on the bezel, wherein when the camera is set to the indicated shutter speed value, the specific aperture value, and the first ISO speed setting, the photograph taken by the camera will have proper exposure.

[0020] The present invention also provides, in some embodiments, a watch for calculating photographic exposure, including a watch case, a dial enclosed in the watch case and visible through an opening in the watch case. The dial includes an aperture reference indicator and a set of a plurality of marks corresponding to camera shutter speed values. The watch may also include a rotatable bezel attached to the watch case such that the bezel can rotate axially around the dial. The rotatable bezel may include a set of a plurality of marks corresponding to camera aperture values and a first ISO speed reference indicator corresponding to a first ISO speed setting. In some embodiments, the aperture values, the shutter speed values, the aperture reference indicator, and the ISO speed reference indicator are arranged such that when the bezel is rotated to bring the aperture reference indicator adjacent to a specific aperture value on the dial, the first ISO speed reference indicator on the bezel is positioned adjacent to an indicated shutter speed value on the dial, wherein when the camera is set to the indicated shutter speed value, the specific aperture value, and the first ISO speed setting, the photograph taken by the camera will have proper exposure.

[0021] In some embodiments, the present invention provides a watch for calculating photographic exposure, including a watch case and an electronic display screen encapsulated within the watch case, wherein the electronic display screen is visible through an opening in the watch case. These watches can have a central processing unit (CPU) configured to execute stored instructions, a user interface configured to enable a user to select a set of stored instructions for execution by the CPU, a display interface that transmits display instructions from the CPU to the electronic display screen, and a storage device containing stored instructions executable by the CPU, wherein the stored instructions include display instructions to render (i) dial markings on a portion of the electronic display screen, and (ii) a virtual bezel on another portion of the electronic display screen, wherein the virtual bezel is axially arranged around the dial portion on the display screen and is capable of axially rotating around the dial portion on the electronic display screen in response to user input through the user interface. In an example of this embodiment, the dial markings include a plurality of markings corresponding to camera aperture values and a first ISO speed reference indicator corresponding to a first ISO speed setting, while the virtual bezel includes an aperture reference indicator and a plurality of markings corresponding to camera shutter speed values. In another example, the dial markings include an aperture reference indicator and a plurality of markings corresponding to camera shutter speed values; while the virtual bezel includes a first ISO speed reference indicator and a plurality of markings corresponding to camera aperture values. When the virtual bezel is virtually rotated so that the aperture reference indicator is adjacent to a specific aperture value, the ISO speed reference indicator is located beside the indicated shutter speed value, such that when the indicated shutter speed value, the specific aperture value, and the first ISO speed setting are set in the camera, the photo taken by the camera will have proper exposure.

[0022] As an example, in some embodiments, the dial markings can include a plurality of markings corresponding to camera aperture values; and a first ISO speed reference indicator corresponding to a first ISO speed setting. The virtual bezel is capable of virtual axial rotation around the dial portion of the electronic display screen in response to user input through the user interface, and includes an aperture reference indicator; and a plurality of markings corresponding to camera shutter speed values. The aperture values, shutter speed values, aperture reference indicator, and first ISO speed reference indicator are arranged such that when the virtual bezel is rotated so that the aperture reference indicator on the virtual bezel is adjacent to a specific aperture value on the dial, the first ISO speed reference indicator on the dial is located beside the indicated shutter speed value, such that when the indicated shutter speed value, the specific aperture value, and the first ISO speed setting are set in the camera, the photo taken by the camera will have proper exposure.

[0023] The present invention also provides, in certain embodiments, a watch for calculating photographic exposure, comprising a watch case, an electronic display screen encapsulated within the watch case, the electronic display screen being visible through an opening in the watch case, a central processing unit (CPU) configured to execute stored instructions, and a storage device containing stored instructions executable by the CPU, wherein the stored instructions include display instructions to render watch face markings on a portion of the electronic display screen, and a photographic exposure calculator on a second portion of the electronic display screen. These watches may also include a user interface configured to enable a user to select a set of stored instructions for execution by the CPU; and a display interface for transmitting the display instructions from the CPU to the electronic display screen. The photographic exposure calculator includes a plurality of camera aperture values, a plurality of ISO speed settings, a plurality of shutter speeds, and a window in which the user may align a particular aperture value and a particular shutter speed value using user input, and the stored instructions will direct the CPU to calculate an appropriate ISO speed for the particular aperture value and the particular shutter speed and display the ISO speed aligned with the particular aperture value and the particular shutter speed value in the window; when a particular ISO speed and a particular shutter speed value are aligned in the window, the stored instructions will direct the CPU to calculate an appropriate aperture value for the particular shutter speed and the particular ISO speed and display the aperture value aligned with the particular ISO speed and the particular shutter speed value in the window; or when a particular aperture value and a particular ISO speed are aligned in the window, the stored instructions will direct the CPU to calculate an appropriate shutter speed value for the particular aperture value and the particular ISO speed and display the shutter speed value aligned with the particular ISO speed and the particular aperture value in the window; when a shutter speed value, a particular aperture value, and a first ISO speed setting are set in the camera, the photograph taken by the camera will obtain proper exposure.

[0024] The present invention also provides software applications for watches for calculating photographic exposure in certain embodiments. These software programs may include instructions for any of the watches described herein.

[0025] In certain embodiments, the instructions included in the application, when the instructions are stored in the storage device of a watch including a storage device, an electronic display screen, a central processing unit (CPU) configured to execute stored instructions, a user interface configured to enable a user to select a set of stored instructions for execution by the CPU; and a display interface for transmitting the display instructions from the CPU to the electronic display screen, the instructions executed by the CPU will cause the display interface to transmit display instructions to render watch face markings on a portion of the electronic display screen. In one example of this embodiment, the watch face markings include a plurality of markings corresponding to camera aperture values and a first ISO speed reference indicator corresponding to a first ISO speed setting. In another example, the watch face markings include an aperture reference indicator and a plurality of markings corresponding to camera shutter speed values.

[0026] In some embodiments, after the CPU executes an instruction, it causes the display interface to transmit a further display instruction to render a virtual bezel in a second portion of the electronic display, wherein the virtual bezel is axially arranged around a dial portion on the display screen. In an example of this embodiment, the dial markings include a plurality of markings corresponding to camera aperture values and a first ISO speed reference indicator corresponding to a first ISO speed setting, and the virtual bezel includes an aperture reference indicator and a plurality of markings corresponding to camera shutter speed values. In another example, the dial markings include an aperture reference indicator and a plurality of markings corresponding to camera shutter speed values; and the virtual bezel includes a first ISO speed reference indicator and a plurality of markings corresponding to camera aperture values. The aperture values, shutter speed values, aperture reference indicator, and first ISO speed reference indicator are arranged such that when the virtual bezel is virtually rotated to bring the aperture reference indicator adjacent to a specific aperture value, the ISO speed reference indicator is located next to the indicated shutter speed value, so that when the indicated shutter speed value, the specific aperture value, and the first ISO speed setting are set in the camera, the photograph taken by the camera will have proper exposure.

[0027] As an example, the electronic display in some embodiments includes a dial including a plurality of markings corresponding to camera aperture values and a first ISO speed reference indicator corresponding to a first ISO speed setting. The virtual bezel is capable of (virtually) axially rotating around the dial portion on the electronic display in response to an input by a user through the user interface. The bezel includes (i) an aperture reference indicator, and (ii) a plurality of markings corresponding to camera shutter speed values. When the bezel is rotated so that the aperture reference indicator on the rotating bezel is adjacent to a specific aperture value on the dial, the first ISO speed reference indicator on the dial is located next to the indicated shutter speed value, so that when the indicated shutter speed value, the specific aperture value, and the first ISO speed setting are set in the camera, the photograph taken by the camera will have proper exposure.

[0028] In some embodiments, the present invention provides a software application for a watch that calculates photographic exposure. These applications include instructions that, when stored in a storage device of a watch that includes a storage device, an electronic display screen, a central processing unit (CPU) configured to execute the stored instructions, a user interface configured to enable a user to select a set of stored instructions for execution by the CPU; and a display interface that transmits display instructions from the CPU to the electronic display screen, cause the CPU to execute instructions that cause the display interface to transmit display instructions to render (i) dial markings on a portion of the electronic display screen, and (ii) a photographic exposure calculator on a second portion of the electronic display screen; wherein the photographic exposure calculator includes a plurality of camera aperture values, a plurality of ISO speed settings, a plurality of shutter speeds, and a window in which the user can position, using user input: a) a specific aperture value and a specific shutter speed value so that they are aligned in the window, and the stored instructions will direct the CPU to calculate an appropriate ISO speed for the specific aperture value and the specific shutter speed and display the ISO speed aligned with the specific aperture value and the specific shutter speed value in the window; b) a specific ISO speed and a specific shutter speed value so that they are aligned in the window, and the stored instructions will direct the CPU to calculate an appropriate aperture value for the specific shutter speed and the specific ISO speed and display the aperture value aligned with the specific ISO speed and the specific shutter speed value in the window; or c) a specific aperture value and a specific ISO speed so that they are aligned in the window, and the stored instructions will direct the CPU to calculate an appropriate shutter speed value for the specific aperture value and the specific ISO speed and display the shutter speed value aligned with the specific ISO speed and the specific aperture value in the window; when the shutter speed value, the specific aperture value, and the first ISO speed setting are set in the camera, the photograph taken by the camera will have proper exposure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] For purposes of illustration and not limitation, aspects, embodiments, or examples of the present invention are illustrated in the figures of the accompanying drawings, in which:

[0030] Figure 1 A top view of a rotatable bezel watch of the present invention is shown. In this embodiment, the watch includes a case 1 and a dial 2 disposed within the case and visible through an opening in the case. The watch further includes a rotatable bezel 3 disposed axially around the dial. The dial includes an ISO speed reference indicator 6 and a plurality of aperture values 5 arranged axially along a portion of the dial 2. The rotatable bezel 3 includes a marker 4 as an aperture reference indicator, and a plurality of markers 7 corresponding to camera shutter speed values. As Figure 1 shown, the watch also includes a second ISO speed reference indicator 8 on the dial, and a second set of camera shutter speed values 9. The illustrated watch also includes a strap 10.

[0031] Figure 2 Figure 1 shows a top view of a rotatable bezel watch according to the present invention. The watch sets two sets of shutter speed values for each ISO speed, one set for brighter conditions (e.g., sunny days) and one set for darker conditions (e.g., cloudy days). In the illustrated embodiment, the rotatable bezel 3 has a set of shutter speeds for ISO speed 100, including a plurality of markings 7 corresponding to camera shutter speeds for cloudy days, and a set of overlapping plurality of markings 11 corresponding to camera shutter speeds for sunny days. The illustrated watch also has a set of shutter speeds for ISO speed 400, consisting of a plurality of markings 9 corresponding to camera shutter speeds for cloudy days, and a plurality of markings 12 corresponding to camera shutter speeds for sunny days.

[0032] Figure 3 A chart is provided showing examples of appropriate combinations of shutter speed, aperture value, and ISO speed according to the exposure triangle, which combinations will result in proper exposure.

[0033] Figure 4 Figure 2 shows a top view of a "smartwatch" embodiment of the watch of the present invention. In these embodiments, the watch includes a case 1 and a dial 2 disposed within the case and visible through the case. A portion of the dial includes a photographic exposure calculator 6 having a set of markings 4 corresponding to ISO speed values, a set of markings 7 corresponding to camera shutter speeds, and a set of markings 5 corresponding to camera aperture values. The photographic exposure calculator 6 also includes a window 8 through which the ISO speed, aperture value, and shutter speed are read. The illustrated watch also includes a strap 10. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0035] In certain embodiments, the present invention provides a rotatable bezel watch that provides photographers with a quick, convenient, and always-available way to determine the required settings for one component of the photographic "exposure triangle" and find appropriate values for the other two components. By simply rotating the bezel to align the required settings with the values of the other components, the appropriate settings for a correct exposure can be read directly from the watch.

[0036] Refer to Figure 1, in certain embodiments, the rotatable bezel watch of the present invention may include a case 1 and a dial 2 disposed within the case such that the dial is visible through an opening in the case. The watch of the present invention may also include a transparent dial cover, for example, a mineral or sapphire crystal hemispherical mirror or other materials known in the prior art.

[0037] The rotatable bezel watch of the present invention further includes a rotatable bezel 3 which is attached to the case 2 in a manner that permits the bezel to rotate axially about the dial. The bezel may be attached to the case movably, for example, by bearings or by providing a lip on the bezel which is located in a groove of the case, or in any other manner (for example, see U.S. Patent 6,744,695). The case may be made of, for example, metal, plastic or any other durable material known in the prior art. The rotatable bezel may be of the same material as the case or of a different material.

[0038] , in certain embodiments, the rotatable bezel watch of the present invention may further include a watch band 10 which is attached to the case and includes a clasp or other means for securing the watch to a user's wrist.

[0039] Referring again to Figure 1 , in certain embodiments, the dial 2 of the rotatable bezel watch of the present invention includes a plurality of markings 5 corresponding to camera aperture values and an ISO speed reference indicator 6 corresponding to a first ISO speed setting. The term "ISO speed setting" is used interchangeably herein with terms such as film speed setting, ISO setting, ISO speed, ASA speed, DIN speed setting, camera speed sensor setting, etc. The ISO speed settings displayed on the dial are typically two or more values selected from the group consisting of ISO 3, 8, 12, 25, 50, 100, 200, 400, 800, 1600, 3200, 6400, 12,800, 25,600, 51,200, 102,400, 204,800, 409,600, 819,200, 1,638,400 and 3,276,800. Most typically, the ISO speed settings are selected from the group consisting of ISO 50, 100, 200, 400, 800, 1600, 3200, 6400, 12800 and 25600.

[0040] The dial 2 further includes a plurality of markings 5 corresponding to camera aperture values. The aperture values may include full stops, half stops, and one-third stop values. These markings typically include two or more values from F95, F32, F22, F16, F11, F8, F5.6, F4, F2.8, F2, F1.4, F1, and F0.95, although other camera aperture values may be used in addition to these. The aperture value refers to the size of the lens aperture. For example, a lens aperture set at F32 is smaller than a lens aperture set at F1.4.

[0041] The rotatable bezel 3 in these embodiments includes markings 6 as aperture reference indicators and a plurality of markings 7 corresponding to camera shutter speed values. The variety of camera shutter speed values includes, for example, two or more values selected from the group: 32000, 16000, 8000, 4000, 2000, 1000, 500, 250, 125, 60, 30, 15, 8, 4, 2, 1, 2, 4, 8, 15, 30, and 60. Typical camera shutter speed values include 8000, 4000, 2000, 1000, 500, 250, and 125, and these values correspond to the reciprocal seconds of the shutter speed (e.g., a camera shutter speed value of 8000 means the camera shutter is open for 1 / 8000 second during exposure).

[0042] The aperture values, shutter speed values, aperture reference indicators, and ISO speed reference indicators are arranged as indicated on the dial and the rotating bezel such that when the rotatable bezel is rotated to place the aperture reference indicator 4 adjacent to a specific aperture value on the dial 2 on the rotatable bezel 3, the ISO speed reference indicator 6 on the dial aligns with the indicated shutter speed value on the rotatable bezel. When the indicated shutter speed, specific aperture value, and ISO speed setting are set in the camera, the photo taken by the camera will have the correct exposure (neither overexposed nor underexposed). Those skilled in the art know the appropriate ISO speed settings, aperture values, and shutter speed values for obtaining proper exposure. A suitable reference for obtaining these combinations is *Understanding Exposure: How to Take Great Pictures with Any Camera* (Bryan Peterson, Amphoto Books, 4th Edition, March 15, 2016), which is hereby incorporated by reference. Examples of appropriate shutter speed, aperture, and ISO speed values are shown in Figure 3 a chart created by Daniel Peter of FotoblogHamburg (http: / / blog.hamburger-fotospots.de / genialer-spickzettel-fuer-fotografen-al s-kostenloser-download / ).

[0043] As an illustrative example of how to use the rotatable bezel watch of the present invention, Figure 1 The rotatable bezel watch shown in Figure 1 has a rotatable bezel 3 rotated so that the shutter speed value 125 is located next to the ISO speed reference indicator 6 on the dial corresponding to the ISO speed 100. An appropriate aperture applicable to the ISO speed 100 and the 1 / 125 second shutter speed is found among the plurality of aperture values 5 on the dial adjacent to the aperture reference indicator 4 on the rotatable bezel. The appropriate aperture value applicable to the ISO speed 100 and the 1 / 125 second shutter speed is F16. If a person sets the camera to an ISO speed of 100, an aperture value of F16, and a shutter speed of 1 / 125 second, the resulting photograph will have proper exposure.

[0044] In some embodiments, the dial includes at least a second ISO speed reference indicator 8 and a second set of markings 9 corresponding to the camera shutter speed values (see Figure 1 ). The positions of the second ISO speed reference indicator and the second set of camera shutter speed values are set such that when the rotatable bezel 3 is rotated to align the second ISO speed reference indicator 8 with the desired shutter speed value in the second set of camera shutter speed values 9, the aperture reference indicator 4 on the rotatable bezel is located next to the appropriate aperture value among the plurality of aperture values 5 on the dial. Referring again to Figure 1 , in this example, the rotatable bezel 3 is rotated so that the aperture value reference indicator 4 is located next to the F16 aperture value among the plurality of aperture values 5 on the dial 2. The appropriate shutter speed using the ISO speed 400 and the F16 aperture value is found in the second set of shutter speed values 9 and aligned with the ISO speed reference indicator 8 corresponding to the ISO speed 400. In this case, the appropriate shutter speed for proper exposure using the ISO speed 400 and the F16 aperture is 500, i.e., 1 / 500 second.

[0045] In some embodiments, as shown in Figure 2 , the watch of the present invention provides two sets of shutter speed values for each ISO speed, one set for brighter conditions (e.g., sunny day) and one set for darker conditions (e.g., cloudy day). For example, in Figure 2In it, the bezel 3 has a first set of shutter speeds for an ISO speed of 100, including a plurality of markings 7 corresponding to the shutter speeds of a camera in overcast conditions, and a second set of overlapping plurality of markings 11 corresponding to the shutter speeds of a camera in sunny conditions. The illustrated watch also has a second set of shutter speeds for an ISO speed of 400. This second set of shutter speeds includes a plurality of markings 9 corresponding to the shutter speeds of a camera in overcast conditions, and a plurality of markings 12 corresponding to the shutter speeds of a camera in sunny conditions. To calculate the appropriate shutter speed for the required aperture and ISO speed, rotate the bezel to align the aperture reference indicator 4 with the required aperture value among the plurality of aperture values 5. Then, align the ISO speed reference indicator 6 with one of the shutter speeds among the plurality of markings 7 of the overcast shutter speeds and one of the shutter speeds among the plurality of markings 11 of the sunny shutter speeds. Depending on the lighting conditions, the photographer can select one of these shutter speeds for exposure. Figure 2 The watch illustrated also has a second set of shutter speeds with an ISO speed different from the ISO speed of the first set of shutter speeds. This second set of shutter speeds includes a first set of shutter speed values 9 for lower light conditions (e.g., overcast) and a second set of shutter speed values 12 for brighter conditions (e.g., sunny). In the illustrated example, the photographer can select from two shutter speeds at ISO 100 and two shutter speeds at ISO 400 depending on the lighting conditions.

[0046] In certain embodiments of the watch of the present invention, it may also include a light measuring device that can determine the ambient lighting conditions by measuring the intensity of the light exposed to the measuring device. The central processing unit (CPU) is configured to adjust one or more of the ISO speed setting, the aperture value, and the shutter speed based on the light measurement to provide settings that, when used to adjust the settings of a camera, will result in a photograph taken by the camera having proper exposure under the ambient lighting conditions. In certain embodiments, the ISO speed settings, the aperture values, and the shutter speeds for both the adjusted and unadjusted light readings are displayed on the dial. In certain embodiments, the light measuring device can determine a first or a second type of lighting condition.

[0047] In other embodiments, the markings on the dial and the rotatable bezel are swapped. For example, the dial includes an aperture reference indicator and camera shutter speed values, while the rotatable bezel includes camera aperture values and an ISO speed reference indicator. The positions of the respective values are set such that when the rotatable bezel is rotated to align a specific aperture value on the rotatable bezel with the aperture reference indicator on the dial, the ISO speed reference indicator on the rotatable bezel aligns with the appropriate shutter speed value. The watch is used in the same manner as the watch described above.

[0048] The present invention also provides a smart watch.

[0049] In certain embodiments, the present invention also provides a "smart watch" in which the dial markings are presented on an electronic display screen. These embodiments may include a physical bezel that is rotatably attached to the watch case that houses the electronic display screen, or may have a "virtual" bezel on which the bezel is displayed on a portion of the electronic display screen and is axially arranged around the portion of the electronic display screen that displays the dial markings. In other embodiments, as Figure 4 shown, the watch of the present invention has a photographic exposure calculator that does not include a rotatable bezel.

[0050] The electronic display screen may be encapsulated in the watch case, for example, the electronic display screen is visible through an opening in the watch case. Suitable electronic display screens are known to those skilled in the art, for example, including light-emitting diode (LED) displays, including organic light-emitting diode (OLED) displays, active matrix organic light-emitting diode (AMOLED) displays, liquid crystal displays (LCD), etc. In certain embodiments, the display screen is a touch screen display.

[0051] These "smart watch" embodiments generally include a central processing unit (CPU) configured to execute stored instructions and a storage device that stores instructions executable by the CPU. The CPU and the storage device may be connected by a bus. For example, the CPU may be a single-core processor, a multi-core processor, or any other configuration. The storage device may include random access memory (RAM), read-only memory (ROM), or any other suitable storage system. In certain embodiments, the storage device includes dynamic random access memory (DRAM).

[0052] The CPU may be connected to a display interface configured to transmit display instructions from the CPU to the electronic display screen. The display instructions generally include instructions to display the dial markings on at least a portion of the electronic display screen. The dial marking instructions may include, for example, instructions to display a plurality of markings corresponding to camera aperture values and an ISO speed reference indicator corresponding to a first ISO speed setting. In certain embodiments, the watch will include a physical bezel that rotates axially around the display screen; the bezel will include an aperture reference indicator and a plurality of markings corresponding to camera shutter speed values. The aperture value, the shutter speed value, the aperture reference indicator, and the ISO speed reference indicator are arranged such that when the bezel is rotated to place the aperture reference indicator adjacent to a particular aperture value on the dial on the rotating bezel, the ISO speed reference indicator on the dial is adjacent to the designated shutter speed value on the rotating bezel. When a designated shutter speed value, a particular aperture value, and a first ISO speed setting are set in the camera, the camera will take a photograph with proper exposure.

[0053] In other embodiments, the rotating bezel is a "virtual" bezel. In these embodiments, the watch includes a storage device storing instructions executable by a CPU. The stored instructions include rendering instructions to display dial markings on a portion of the electronic display and a virtual bezel on a second portion of the electronic display, wherein the virtual bezel surrounds the dial markings displayed on a portion of the electronic display and axially disposed around the dial portion. The dial markings include a plurality of markings corresponding to camera aperture values and an ISO speed reference indicator corresponding to a first ISO speed setting. The display instructions include instructions to display an aperture reference indicator on the virtual bezel and a plurality of markings corresponding to camera shutter speed values. The aperture values, shutter speed values, aperture reference indicator, and ISO speed reference indicator are arranged such that when the virtual bezel is rotated to place the aperture reference indicator adjacent to a specific aperture value on the bezel adjacent to the dial, the ISO speed reference indicator on the dial is adjacent to a designated shutter speed value on the bezel. When a designated shutter speed value, a specific aperture value, and a first ISO speed setting are set in the camera, the camera will take a photograph with proper exposure. Additionally, the present invention provides embodiments where the markings on the virtual bezel and the dial are exchanged. For example, in some embodiments, the dial includes a plurality of markings corresponding to camera aperture values and at least a first ISO speed reference indicator corresponding to a first ISO speed setting, while the virtual bezel includes an aperture reference indicator and a plurality of markings corresponding to camera shutter speed values. As another example, the dial may include an aperture reference indicator and a plurality of markings corresponding to camera shutter speed values, while the virtual bezel includes a plurality of markings corresponding to camera aperture values and at least a first ISO speed reference indicator corresponding to a first ISO speed setting.

[0054] The smartwatch may also include a user interface configured to enable a user to select a set of stored instructions for execution by the CPU or input information to be input into the stored instructions. For example, in embodiments with an electronic display presenting a virtual bezel, the user interface may cause the virtual bezel to rotate (virtually) around the dial. The user interface may include a stem that, when turned by the user, changes the instructions to be executed by the CPU (e.g., turning the stem causes the virtual bezel to rotate). The user interface may also include one or more physical buttons on the watch or virtual buttons displayed on a touchscreen display. In some embodiments including a touchscreen display, the user can rotate the virtual bezel by touching the bezel and sliding a finger along the bezel. In these embodiments, the watch may include one or more touch sensors along the portion of the electronic display showing the virtual bezel. The touch sensors are connected to a touch controller that receives data from the touch sensors. The CPU then processes this data.

[0055] The user interface can also be configured to allow the user to select a specific ISO speed reference indicator and corresponding multiple camera shutter speed values for display on the electronic display. For example, if a photographer wishes to use a 400 ISO speed, the photographer can use the user interface to select the ISO 400 reference indicator, and the watch will display the shutter speed values corresponding to the 400 ISO speed.

[0056] In other embodiments, the watch of the present invention has a photographic exposure calculator that does not include a bezel, whether physical or virtually displayed on the electronic display. An example of such an embodiment is as Figure 4 shown, which shows a "smart watch" that includes a watch case 1 and an electronic display disposed in the watch case. In these embodiments, the watch includes a storage device storing instructions executable by a CPU. The stored instructions include display instructions to render dial markings on a part of the electronic display and a photographic exposure calculator 6 on a second part of the electronic display. The photographic exposure calculator 6 includes a series of camera aperture values 5, a series of ISO speed settings 6, and a series of shutter speeds 7. The relative positions of the aperture values, shutter speed values, and ISO speeds can be changed according to user input. The user can use user input to set two of these values so that the desired values are aligned in the window 8, and then the stored instructions calculate the appropriate value for the third value. For example, in Figure 4 it, the user may have set an 800 ISO speed and an aperture value of F5.6, and the executed stored instructions direct the electronic display to display a shutter speed of 500 (1 / 500 second) in the window 8. When the specified shutter speed value, aperture value, and ISO speed setting aligned in the window 8 are set in the camera, the camera will take a photo with proper exposure.

[0057] In some embodiments, the watch of the present invention may also include a light measuring device capable of measuring the light intensity to which the light measuring device is exposed. The CPU is configured to adjust one or more ISO speed settings, aperture values, and shutter speeds based on the light measurement to provide settings that, when used to adjust the settings on a camera, will cause the photo taken by the camera to have proper exposure in ambient light. In some embodiments, the ISO speed settings, aperture values, and shutter speeds with and without light adjustment readings are all displayed on the dial.

[0058] The present invention also provides a software application for a smartwatch for calculating appropriate photographic exposure. The application can include instructions that, when stored in a storage device of a watch including a storage device, an electronic display, a central processing unit (CPU) configured to execute the stored instructions, a user interface configured to enable a user to select a set of stored instructions to execute; and a display interface configured to transfer display instructions from the CPU to the electronic display, the instructions include display instructions for rendering dial markings on a portion of the electronic display. In some embodiments, the display instructions also cause a virtual bezel to be displayed on a second portion of the electronic display. The virtual bezel is placed axially around the dial portion of the display portion and is capable of being (virtually) rotated axially with respect to the display of the dial portion. In some embodiments, the dial markings include a series of markings corresponding to camera aperture values, and an ISO speed reference indicator corresponding to a first ISO speed setting; in these embodiments, the rotatable bezel includes an aperture reference indicator and a series of markings corresponding to shutter speed values. In other embodiments, the dial markings include an aperture reference indicator and a series of markings corresponding to shutter speed values, and the virtual bezel includes a series of markings corresponding to camera aperture values and an ISO speed reference indicator corresponding to a first ISO speed setting. When the virtual bezel is virtually rotated so that the aperture reference indicator is adjacent to a particular aperture value on the dial, the ISO speed reference indicator is positioned adjacent to a designated shutter speed value on the dial, and when this designated shutter speed value, the particular aperture value, and the first ISO speed setting are set in the camera, the camera will take a photo with appropriate exposure.

[0059] In one example, the aperture reference indicator and the series of markings corresponding to shutter speed values are located on the rotatable bezel, and the instructions direct the electronic display to arrange the aperture value, the aperture reference indicator, and the ISO speed reference indicator such that when the rotatable bezel is rotated to place the aperture reference indicator adjacent to a particular aperture value on the dial, the ISO speed reference indicator on the dial is positioned adjacent to a designated shutter speed value on the rotatable bezel. When the camera is set with this designated shutter speed value, the particular aperture value, and the first ISO speed setting, a photo with appropriate exposure will be obtained.

[0060] In other embodiments, the instructions provided by the software application of the present invention, when stored in the storage device of a watch comprising a storage device, an electronic display screen, a central processing unit (CPU) configured to execute the stored instructions, a user interface configured to enable a user to select a set of stored instructions to be executed; and a display interface configured to transmit display instructions from the CPU to the electronic display screen, include display instructions for rendering dial markings on a portion of the electronic display screen and display instructions for rendering the photographic exposure calculator 6 on a second portion. The photographic exposure calculator 6 includes a series of camera aperture values 5, a series of ISO speed settings 6, and a series of shutter speeds 7. The relative positions of the aperture value, the shutter speed value, and the ISO speed can be changed according to user input. The application also includes instructions that allow the user to use user input to set these two values to align the desired values in the window 8 and then the stored instructions calculate the appropriate value of the third value. When the user aligns a specific aperture value and a specific shutter speed value in the window using user input, the stored instructions will direct the CPU to calculate the appropriate ISO speed for the specific aperture value and the specific shutter speed and display the appropriate ISO speed in the window in a manner aligned with the specific aperture value and the specific shutter speed value. Similarly, when the user aligns a specific ISO speed and a specific shutter speed value in the window using user input, the stored instructions will direct the CPU to calculate the appropriate aperture value for the specific shutter speed and the specific ISO speed and display the appropriate aperture value in the window in a manner aligned with the specific ISO speed and the specific shutter speed value. When the user aligns a specific aperture value and a specific ISO speed in the window using user input, the stored instructions will direct the CPU to calculate the appropriate shutter speed value for the specific aperture value and the specific ISO speed and display the appropriate shutter speed value in the window in a manner aligned with the specific ISO speed and the specific aperture value. In each case, when the shutter speed value, the aperture value, and the ISO speed setting are aligned with each other in the window and set in the camera, the photo taken by the camera will have proper exposure.

[0061] In an alternative embodiment, a watch can be used to calculate photographic exposure.

[0062] Photographers often want to prioritize a certain element of the exposure triangle to achieve the desired photographic effect. For example, if a photographer wants to prioritize a fast shutter speed to capture a fast-moving object, the photographer must determine the appropriate aperture value and ISO speed setting for that shutter speed to obtain a good exposure. The watch of the present invention enables the photographer to quickly and easily determine these settings. By simply rotating the bezel to place the ISO speed reference indicator next to the desired shutter speed, the photographer can simply look at the watch and identify which aperture value is adjacent to the aperture reference indicator to determine the appropriate aperture value. Or, if the focal length is the primary concern of the photographer for a particular photo, the photographer rotates the bezel to place the aperture reference indicator next to the desired aperture value and can read the shutter speed that aligns with the ISO speed reference indicator. The settings indicated by the rotating bezel watch are then input into the camera, which then takes a photo with the appropriate exposure.

[0063] If the watch includes a second ISO speed reference indicator and a corresponding second set of shutter speeds, the photographer has additional options for achieving the desired photographic effect. For example, if the watch has an ISO speed reference indicator for 400 and a second ISO speed reference indicator for 100, and the photographer wants to obtain a photo with a deep depth of field and a clear image of a fast-moving object, the photographer will rotate the bezel to align the aperture reference indicator with a high aperture value (e.g., F16) and will find the appropriate shutter speed that aligns with the ISO 400 speed reference indicator, rather than the ISO 100 speed reference indicator.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A watch for calculating photographic exposure, characterized in that, The watch includes: a) a watch case; b) a dial placed in the watch case and visible through an opening of the watch case; c) a rotatable bezel attached to the watch case such that the rotatable bezel can rotate axially around the dial; Wherein: i) the dial includes: a plurality of marks corresponding to camera aperture values; and at least one first ISO speed reference indicator corresponding to a first ISO speed setting; the rotatable bezel includes: an aperture reference indicator; and at least a first set of marks corresponding to camera shutter speed values; Or, ii) the dial includes: an aperture reference indicator; and at least a first set of marks corresponding to a first set of camera shutter speed values; the rotatable bezel includes: a plurality of marks corresponding to camera aperture values; and at least one first ISO speed reference indicator corresponding to a first ISO speed setting; Wherein, the marks corresponding to the aperture values, shutter speed values, aperture reference indicator and first ISO speed reference indicator are arranged such that when the rotatable bezel is rotated to place the aperture reference indicator beside a specific aperture value, the first ISO speed reference indicator is located beside the indicated shutter speed value, wherein when the indicated shutter speed value, specific aperture value and first ISO speed setting are set in the camera, the photo taken by the camera will have proper exposure.

2. The watch according to claim 1, characterized in that, The plurality of marks corresponding to camera aperture values includes one or more values of full stops, half stops and one-third stops.

3. The watch according to claim 1, characterized in that, The plurality of marks corresponding to camera aperture values includes two or more values selected from the following group: 0.95, 1, 1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22, 32, 45 and 95.

4. The watch according to claim 1, characterized in that, The first set of marks corresponding to camera shutter speed values includes two or more values selected from the following group: 32,000, 16,000, 8,000, 4,000, 2,000, 1,000, 500, 250, 125, 60, 30, 15, 8, 4, 2, 1, 2, 4, 8, 15, 30 and 60.

5. The watch according to claim 1, characterized in that, The first ISO speed setting is selected from the following group: ISO 3, 8, 12, 25, 50, 100, 200, 400, 800, 1,600, 3,200, 6,400, 12,800, 25,600, 51,200, 102,400, 204,800, 409,600, 819,200, 1,638,400 and 3,276,800.

6. The watch according to claim 1, wherein: a) the dial includes: i) a plurality of marks corresponding to camera aperture values; ii) a first ISO speed reference indicator corresponding to a first ISO speed setting; and iii) at least one second ISO speed reference indicator corresponding to a second ISO speed setting; and the rotatable bezel includes: iv) an aperture reference indicator; v) a first set of marks corresponding to camera shutter speed values; and vi) at least a second set of marks corresponding to a second set of camera shutter speed values; Or, b) The dial includes: i) An aperture reference indicator; ii) A first set of markings corresponding to camera shutter speed values; and iii) At least a second set of markings corresponding to a second set of camera shutter speed values; and the rotatable bezel includes: iv) A plurality of markings corresponding to camera aperture values; v) A first ISO speed reference indicator corresponding to a first ISO speed setting; and vi) At least one second ISO speed reference indicator corresponding to a second ISO speed setting; wherein the second ISO speed reference indicator and the second set of markings corresponding to the second set of camera shutter speed values are arranged such that when the rotatable bezel is rotated to place the aperture reference indicator beside a particular aperture value, the second ISO speed reference indicator is beside a second indicated shutter speed value within the second set of camera shutter speed values, wherein when the second indicated shutter speed value, the particular aperture value, and the second ISO speed setting are set in the camera, a photograph taken by the camera will have proper exposure.

7. The watch according to claim 6, characterized in that, wherein the second ISO speed setting is different from the first ISO speed setting and is selected from the group consisting of: ISO 3, 8, 12, 25, 50, 100, 200, 400, 800, 1,600, 3,200, 6,400, 12,800, 25,600, 51,200, 102,400, 204,800, 409,600, 819,200, 1,638,400, and 3,276,800.

8. The watch according to claim 6, characterized in that, The second set of markings corresponding to camera shutter speed values includes two or more values selected from the group consisting of: 32,000, 16,000, 8,000, 4,000, 2,000, 1,000, 500, 250, 125, 60, 30, 15, 8, 4, 2, 1, 2, 4, 8, 15, 30, and 60.

9. The watch according to claim 1, characterized in that, The watch includes a first set of markings corresponding to camera shutter speed values for a first type of lighting condition and a second set of markings corresponding to camera shutter speed values for a second type of lighting condition; wherein the first set of camera shutter speed values and the second set of camera shutter speed values are arranged such that when the rotatable bezel is rotated to place the aperture reference indicator beside a particular aperture value, the first ISO speed reference indicator is aligned with a first indicated shutter speed value within the first set of camera shutter speed values and a second indicated shutter speed value within the second set of camera shutter speed values; wherein: a) When the first indicated shutter speed, the particular aperture value, and the first ISO speed setting are set in the camera, a photograph taken by the camera will have proper exposure under the first type of lighting condition; and b) When the second indicated shutter speed, the particular aperture value, and the first ISO speed setting are set in the camera, a photograph taken by the camera will have proper exposure under the second type of lighting condition.

10. The watch according to claim 9, characterized in that, The first type or the second type of lighting condition includes sunny lighting conditions.

11. The watch according to claim 9, characterized in that, The first type or the second type of lighting condition includes cloudy lighting conditions.

12. The watch according to claim 9, characterized in that, The watch further includes a light measuring device configured to measure the intensity of light to which the light measuring device is exposed, thereby determining one or both of a first type or a second type of lighting condition.

13. The watch according to claim 1, characterized in that, The dial includes an electronic display screen.

14. The watch according to claim 13, characterized in that, The watch further includes: a) A central processing unit (CPU) configured to execute stored instructions; b) A memory device containing stored instructions executable by the CPU, where the stored instructions include display instructions for rendering dial markings on the electronic display screen, and the dial markings include a first ISO speed reference indicator and a plurality of markings corresponding to camera aperture values; and c) A user interface configured to enable a user to select a set of stored instructions for execution by the CPU.

15. The watch according to claim 14, characterized in that, The user interface allows the user to select a desired ISO speed setting, and the display instructions cause: a) The ISO speed reference indicator of the desired ISO speed setting to be displayed on the dial, and b) The positions of the plurality of aperture values on the dial to be positioned such that when the rotatable bezel is rotated to place the aperture reference indicator beside a specific camera aperture value beside the bezel, the ISO speed reference indicator is located beside the indicated shutter speed value on the rotatable bezel; wherein when the indicated shutter speed value, the specific aperture value, and the first ISO speed setting are set in the camera, the photo taken by the camera will have proper exposure.

16. A watch for calculating photographic exposure, comprising: a) A watch case; b) An electronic display screen enclosed within the watch case, where the electronic display screen is visible through an opening in the watch case; c) A central processing unit (CPU) configured to execute stored instructions; d) A display interface for transmitting display instructions from the CPU to the electronic display screen; e) A user interface configured to enable a user to select a set of stored instructions for execution by the CPU; f) A memory device containing stored instructions executable by the CPU, where the stored instructions include rendering instructions: i) To display dial markings on a portion of the electronic display screen, and ii) To display a virtual bezel on another portion of the electronic display screen, where the virtual bezel surrounds the display of the dial portion and is capable of axial rotation on the electronic display screen of the dial portion in response to user input through the user interface; g) Wherein: i) The dial markings include a plurality of markings corresponding to camera aperture values and a first ISO speed reference indicator corresponding to a first ISO speed setting; and the virtual bezel includes an aperture reference indicator and a plurality of markings corresponding to camera shutter speed values; or ii) The dial markings include an aperture reference indicator and a plurality of markings corresponding to camera shutter speed values; and the virtual bezel includes a first ISO speed reference indicator and a plurality of markings corresponding to camera aperture values. Among them, the markings corresponding to the aperture value, shutter speed value, aperture reference indicator, and the first ISO speed reference indicator are arranged such that when the virtual bezel is virtually rotated to place the aperture reference indicator beside a specific aperture value, the first ISO speed reference indicator is located beside the indicated shutter speed value, and when the indicated shutter speed value, specific aperture value, and the first ISO speed setting are set in the camera, the photo taken by the camera will have proper exposure.

17. A watch for calculating photographic exposure, comprising: a) A watch case; b) An electronic display screen enclosed within the watch case, where the electronic display screen is visible through an opening in the watch case; c) A central processing unit (CPU) configured to execute stored instructions; d) A memory device containing stored instructions executable by the CPU, where the stored instructions include display instructions to render dial markings on a portion of the electronic display screen and to render a photographic exposure calculator on a second portion of the electronic display screen; e) A user interface configured to enable a user to select a set of stored instructions for execution by the CPU; f) A display interface that transmits the display instructions from the CPU to the electronic display screen; g) Wherein the photographic exposure calculator includes a set of camera aperture values, a set of ISO speed settings, a set of shutter speeds, and a window in which a user can align using user input: i) A specific aperture value and a specific shutter speed value, and the stored instructions will instruct the CPU to calculate the appropriate ISO speed to accommodate the specific aperture value and the specific shutter speed, and display the ISO speed aligned with the specific aperture value and the specific shutter speed value in the window; ii) A specific ISO speed and a specific shutter speed value, and the stored instructions will instruct the CPU to calculate the appropriate aperture value to accommodate the specific shutter speed and the specific ISO speed, and display the aperture value aligned with the specific ISO speed and the specific shutter speed value in the window; iii) A specific aperture value and a specific ISO speed, and the stored instructions will instruct the CPU to calculate the appropriate shutter speed value to accommodate the specific aperture value and the specific ISO speed, and display the shutter speed value aligned with the specific ISO speed and the specific aperture value in the window; Wherein, when the specific shutter speed value, specific aperture value, and specific ISO speed setting are set in the camera, the photo taken by the camera will have proper exposure.

18. A computer-readable storage medium for storing a software application for programming a watch for computational photography exposure, wherein the application includes instructions that, when stored in the memory device of a watch comprising a memory device, an electronic display, a central processing unit (CPU) configured to execute stored instructions, a user interface configured to enable a user to select a set of stored instructions for execution by the CPU, and a display interface for transmitting display instructions from the CPU to the electronic display, cause the CPU to execute the instructions to cause the display interface to transmit display instructions to render dial markings on a portion of the electronic display and to render a virtual bezel on a second portion of the electronic display, wherein the virtual bezel is arranged about the display axis of the dial portion on the display; wherein, a) the dial markings include: i) a plurality of markings corresponding to camera aperture values; and ii) at least one first ISO speed reference indicator corresponding to a first ISO speed setting; and b) the virtual bezel is capable of axial virtual rotation on the dial portion of the electronic display in response to user input via the user interface, wherein the virtual bezel includes: i) an aperture reference indicator; and ii) a plurality of markings corresponding to camera shutter speed values; wherein the arrangement of the aperture value, the shutter speed value, the aperture reference indicator, and the first ISO speed reference indicator is such that when the virtual bezel is rotated to place the aperture reference indicator beside a particular aperture value on the dial, the first ISO speed reference indicator on the dial is located beside the indicated shutter speed value on the virtual bezel, wherein when the indicated shutter speed value, the particular aperture value, and the first ISO speed setting are set in the camera, the photograph taken by the camera will have proper exposure.

Images