Watch for calculating photographic exposure

Abstract

The utility model discloses a watch used for calculating photography exposure. The watch comprises a watch shell; a dial disposed in the watch case, the dial being visible through the opening of the watch case; a rotatable bezel attached to the watch case such that the rotatable bezel is axially rotatable about the dial; wherein the dial plate comprises a plurality of marks corresponding to the aperture value of the camera; and at least one first ISO speed reference indicator corresponding to the first ISO speed setting; the rotatable bezel includes: an aperture reference indicator; and at least a first set of indicia corresponding to a camera shutter speed value; or the two are opposite; the watch provides a structure that calculates 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 the camera in the watch. The equipment provides a simple, quick and convenient structure to calculate the proper setting of each component part of the photographic exposure triangle.

Description

Technical Field

[0001] The utility model generally relates to a wearable device, and more particularly to a watch for calculating photographic exposure, which provides a quick and easy method for calculating appropriate camera shutter speed and aperture settings for a given ISO speed setting to obtain settings that, when input into a camera, will result in an appropriate photographic exposure. 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 element that determines what is actually recorded on a camera's film or other image sensor (e.g., an electronic sensor).

[0003] Cameras typically offer adjustable settings for the three components of the exposure triangle. The ISO speed setting (often referred to as the "ISO speed" setting, where ISO refers to the International Organization for Standardization, which standardizes the sensitivity of camera sensors to light) controls the camera sensor's sensitivity to light. Typically, each number represents a change of one stop of light, with each increment of ISO speed representing a doubling or halving of the sensor's sensitivity to light. For example, at an ISO speed setting of 100, the camera sensor is half as sensitive as it is at an ISO setting of 200. The lower the ISO speed setting, the less sensitive the image sensor is, and so the image will appear smoother 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's diaphragm, which determines the amount of light that is focused through the lens. Aperture settings are usually specified as an "f-number." A small f-number, such as f / 2, has a relatively large opening, allowing a lot of light to pass through, even for a short period of time. A larger f-number setting, such as f / 22, makes the opening smaller, allowing 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 than a smaller aperture (i.e., a larger f-number). Aperture settings are usually calibrated so that the same amount of light passes through a lens with a 35mm focal length and a lens with a 100mm focal length when both lenses are set at the same shutter speed (e.g., 1 / 125 second).

[0005] The third component of the "exposure triangle" is shutter speed, which determines how long light has to pass through the lens and hit the image sensor or film plane. Shutter speed is usually measured in fractions of a second and is usually displayed on the camera as the reciprocal of the time the shutter is open (for example, a shutter speed of "125" usually means that the shutter is open for 1 / 125 of a second for each exposure). Adjusting the shutter speed can change the way moving objects are captured in a photographic image. If the shutter speed is faster than the movement of the object or 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 often wish to set one element of the exposure triangle to achieve a 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 achieve a shallow depth of focus). To obtain the correct exposure when using the desired settings, the photographer must calculate the appropriate values ​​for the other two elements of the exposure triangle. Such calculations often require reference to a chart, for example, one that shows the relationship 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 material available.

[0007] In view of the above problems, there is a need for a simple, fast and convenient method to calculate the appropriate settings of the exposure triangle components to obtain proper photographic exposure. The utility model meets this need and other needs. Utility Model Content

[0008] In certain embodiments, the utility model provides a watch for calculating photographic exposure. The watch may include a watch case; a dial is disposed in the watch case, and the dial is visible through an opening in the watch case. The dial may include a plurality of marks corresponding to the camera aperture value; and a first ISO speed reference indicator corresponding to the first ISO speed setting. The watch may also include a rotatable bezel attached to the watch case so that the bezel can be axially rotated around the dial. The rotatable bezel may include an aperture reference indicator; and a group of marks corresponding to the camera shutter speed value, wherein the aperture value, the shutter speed value, the aperture reference indicator, and the first ISO speed reference indicator are arranged in such a manner that when the rotatable bezel is rotated so that the aperture reference indicator on the 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 shutter speed value indicated on the rotatable bezel. In this way, when the camera is set to the indicated shutter speed value, the specific aperture value, and the first ISO speed setting, the photo taken by the camera will be properly exposed.

[0009] In some embodiments, the plurality of marks corresponding to the camera aperture values ​​may include one or more values ​​of full stops, half stops, and one-third stops. In a specific embodiment, the plurality of marks corresponding to the camera aperture values ​​include 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, a first set of indicia 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, a 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 certain embodiments of the present invention, the watch includes a rotatable bezel, the bezel further includes a second set of marks corresponding to the camera shutter speed value; and 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 in such a way that when the bezel is rotated so that the aperture reference indicator is located on the bezel and adjacent to the specific aperture value on the dial, the second ISO speed reference indicator on the dial is located next to the second indicated shutter speed value in the second set of camera shutter speed values ​​on the rotating bezel. At this point, 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 obtain a proper exposure. The second ISO speed setting is typically 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 indicia 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 certain embodiments, the present invention provides a watch for calculating photographic exposure, the watch comprising a watch case, a dial placed in the watch case (the dial is visible through an opening in the watch case), and a rotatable bezel attached to the watch case so that the bezel can rotate axially around the dial. These embodiments can have at least two different marking layouts on the rotatable bezel and the dial. In one of these layouts, the dial can include a plurality of markings 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 markings corresponding to camera shutter speed values. In another layout, the marking positions of the dial and the rotatable bezel are interchanged, so that the dial includes an aperture reference indicator and at least one set of markings corresponding to camera shutter speed values; and the rotatable bezel includes a plurality of markings 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 value, shutter speed value, aperture reference indicator, and first ISO speed reference indicator are arranged in such a manner that when the rotatable bezel is rotated so that the aperture reference indicator is adjacent to the specific aperture value, the first ISO speed reference indicator is adjacent to the 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 obtain a proper exposure.

[0013] As an example, when the camera aperture value and ISO speed reference indicators are located on the dial, and the aperture reference indicator and camera shutter speed value are located on a 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 dial, the ISO speed reference indicator on the dial will be adjacent to an indicated shutter speed value on the rotatable bezel.

[0014] Similarly, as another example, when the camera aperture value and ISO speed reference indicators are located on a rotatable bezel and the aperture reference indicator and camera shutter speed value are located on a dial, and the bezel is rotated so that the aperture reference indicator on the dial is adjacent to a particular 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 dial.

[0015] In certain embodiments, the present invention provides a watch having multiple groups of marks for one or more camera aperture values, ISO speed reference indicators, camera shutter speed values, and aperture reference indicators. For example, the watch provided by the present invention may be: (a) the dial includes multiple marks corresponding to camera aperture values, a first ISO speed reference indicator corresponding to a first ISO speed setting; and at least one second ISO speed reference indicator corresponding to a second ISO speed setting, while the rotatable bezel includes an aperture reference indicator and a first group of marks corresponding to the first group of camera shutter speed values; or (b) the dial includes an aperture reference indicator, a first group of marks corresponding to camera shutter speed values, and at least one second group of marks corresponding to the second group of camera shutter speed values, while the rotatable bezel includes multiple marks corresponding to camera aperture values, a first ISO speed reference indicator corresponding to a first ISO speed setting, and at least one 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 in such a manner that when the bezel is rotated so that the aperture reference indicator is adjacent to a specific aperture value, the first ISO speed reference indicator is adjacent to an indicated shutter speed value, at which point the camera will obtain a proper exposure if the indicated shutter speed value, the specific aperture value, and the first ISO speed setting are set in the camera. The second ISO speed reference indicator and the second group of markings corresponding to the second group of camera shutter speed values ​​are arranged in such a manner that when the bezel is rotated so that the aperture reference indicator is adjacent to the specific aperture value, the second ISO speed reference indicator is adjacent to a second indicated shutter speed value in the second group of camera shutter speed values, at which point the camera will obtain a proper exposure if the second indicated shutter speed, the specific aperture value, and the second ISO speed setting are set in the camera.

[0016] In some embodiments, the watch of the utility model includes a set of camera shutter speed values ​​suitable for a first ISO speed, wherein the first set includes a set of multiple marks corresponding to the camera shutter speed values ​​under the first lighting condition, and a set of multiple marks corresponding to the camera shutter speed values ​​under the second lighting condition set. In these embodiments, the first set of camera shutter speed values ​​and the second set of camera shutter speed values ​​are usually located on the rotatable bezel, or are both located on the dial. The arrangement of the first set of camera shutter speed values ​​and the second set of camera shutter speed values ​​is: when the bezel is rotated so that the aperture reference indicator is adjacent to a specific aperture value, the first ISO speed reference indicator is aligned with a shutter speed value indicated in the first set of camera shutter speed values ​​and a second shutter speed value indicated in the second set of camera shutter speed values. When the camera is set with the first set of indicated shutter speeds, the specific aperture value, and the first ISO speed setting, the photo taken by the camera will obtain a proper exposure under the first lighting condition; and when the second set of indicated shutter speeds, the specific aperture value, and the first ISO speed setting are set, the photo taken by the camera will obtain a 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 cloudy day light.

[0017] In some embodiments, the watch of the present invention may also include a light measurement device that is capable of measuring the light conditions to which the measurement device is exposed. The 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 settings on a camera, will cause the camera to capture photos that are properly exposed in the ambient light. In some embodiments, the ISO speed setting, aperture value, and shutter speed (including both light-adjusted and unadjusted readings) are displayed on the dial.

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

[0019] The stored instructions of the electronic display watch of the utility model may, in some embodiments, include one or more ISO speed settings, wherein when a user selects a specific ISO speed setting using a user interface, the displayed instructions will cause: a) an ISO speed reference indicator for the selected ISO speed setting to be displayed on the dial, and b) multiple aperture value positions to be positioned on the dial so that when the rotating bezel places the aperture reference indicator on the rotating bezel adjacent to a specific camera aperture value on the dial, the ISO speed reference indicator is positioned on the rotating bezel adjacent to an indicated shutter speed value, wherein when the camera sets the indicated shutter speed value, the specific aperture value and the first ISO speed setting, the photo taken by the camera will obtain proper exposure.

[0020] The utility model also provides a watch for calculating photographic exposure in certain embodiments, comprising a watch case, a dial enclosed in the watch case, and the dial is visible through an opening in the watch case. The dial includes an aperture reference indicator and a plurality of marks corresponding to the camera shutter speed value. The watch may also include a rotatable bezel attached to the watch case so that the bezel can be axially rotated around the dial. The rotatable bezel may include a plurality of marks corresponding to the camera aperture value and a first ISO speed reference indicator corresponding to the first ISO speed setting. In certain embodiments, the aperture value, the shutter speed value, the aperture reference indicator, and the ISO speed reference indicator are arranged in such a manner that when the bezel is rotated so that the aperture reference indicator is adjacent to a specific aperture value on the dial, the first ISO speed reference indicator on the rotating bezel is located 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 photo taken by the camera will obtain a proper exposure.

[0021] In certain embodiments, the present invention provides a watch for calculating photographic exposure, comprising a watch case and an electronic display screen enclosed in the watch case, wherein the electronic display screen is visible through an opening in the watch case. These watches may 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 to be executed by the CPU, a display interface for transmitting 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 can be axially rotated 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 marks 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 marks corresponding to camera shutter speed values. In another example, the dial markings include an aperture reference indicator and a plurality of marks corresponding to camera shutter speed values, and the virtual bezel includes a first ISO speed reference indicator and a plurality of marks 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 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, a picture taken by the camera will obtain a proper exposure.

[0022] As an example, in some embodiments, the dial markings may include a plurality of markings corresponding to the camera aperture values; and a first ISO speed reference indicator corresponding to the first ISO speed setting. The virtual bezel is capable of virtually axially rotating about 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 the camera shutter speed values. The aperture values, shutter speed values, aperture reference indicator, and first ISO speed reference indicator are arranged in a manner such that when the virtual bezel is rotated so that the aperture reference indicator is adjacent to a specific aperture value on the dial on the virtual bezel, the first ISO speed reference indicator on the dial is located adjacent 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, a photograph taken by the camera will obtain a proper exposure.

[0023] The utility model also provides a watch for calculating photographic exposure in certain embodiments, including a watch case, an electronic display screen enclosed in the watch case, the electronic display screen 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 dial 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 to be executed by the CPU; and a display interface for transmitting display instructions from the CPU to the electronic display screen. The photographic exposure calculator includes multiple camera aperture values, multiple ISO speed settings, multiple shutter speeds, and a window, wherein a user can align a specific aperture value and a specific shutter speed value in the window using user input, and the stored instructions will direct the CPU to calculate the appropriate ISO speed as the specific aperture value and the specific shutter speed, and display the ISO speed in the window aligned with the specific aperture value and the specific shutter speed value; when the specific ISO speed and the specific shutter speed value are aligned in the window, the stored instructions will direct the CPU to calculate the appropriate aperture value as the specific shutter speed and the specific ISO speed, and display the aperture value in the window aligned with the specific ISO speed and the specific shutter speed value; or when the specific aperture value and the specific ISO speed are aligned in the window, the stored instructions will direct the CPU to calculate the appropriate shutter speed value as the specific aperture value and the specific ISO speed, and display the shutter speed value in the window aligned with the specific ISO speed and the specific aperture value; when the 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 obtain the appropriate exposure.

[0024] The utility model also provides software application programs for watches for calculating photographic exposure in certain embodiments. These software programs may include instructions for any watch described herein.

[0025] In some embodiments, the application comprises instructions that, when stored in a 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 by the CPU; and a display interface for transmitting 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 dial markings on a portion of the electronic display screen. In one 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. In another example, the dial markings include an aperture reference indicator and a plurality of markings corresponding to camera shutter speed values.

[0026] In some embodiments, the CPU, after executing the instructions, causes the display interface to transmit further display instructions to render a virtual bezel on the second portion of the electronic display screen, wherein the virtual bezel is axially arranged around the dial portion on the display screen. In one example of this embodiment, the dial markings include a plurality of markings corresponding to the camera aperture values ​​and a first ISO speed reference indicator corresponding to the first ISO speed setting, and the virtual bezel includes an aperture reference indicator and a plurality of markings corresponding to the camera shutter speed values. In another example, the dial markings include an aperture reference indicator and a plurality of markings corresponding to the camera shutter speed values; and the virtual bezel includes a first ISO speed reference indicator and a plurality of markings corresponding to the camera aperture values. The aperture value, the shutter speed value, the aperture reference indicator, and the first ISO speed reference indicator are arranged in such a manner that 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 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 photo taken by the camera will obtain a proper exposure.

[0027] As an example, an electronic display screen 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 a portion of the dial on the electronic display screen in response to user input via a 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 is adjacent to a particular aperture value on the dial on the rotating bezel, the first ISO speed reference indicator on the dial is located adjacent to the indicated shutter speed value, so that when the indicated shutter speed value, the particular aperture value, and the first ISO speed setting are set in the camera, a photograph taken by the camera will obtain a proper exposure.

[0028] In certain embodiments, the utility model provides a software application for a watch for calculating photographic exposure. These applications include instructions, and when these instructions are stored in a storage device of a watch including 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 by the CPU; and a display interface for transmitting 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 (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 multiple camera aperture values, multiple ISO speed settings, multiple shutter speeds, and a window in which a user can position in the window 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 instruct the CPU to select the aperture value and the shutter speed for the specific aperture value and the specific shutter speed. The camera may further comprise a first instruction set comprising: a) a specific ISO speed and a specific shutter speed value so that they are aligned in the window, the stored instructions directing the CPU to calculate an appropriate ISO speed for the specific shutter speed and the specific ISO speed and to display the aperture value in the window in alignment with the specific ISO speed and the specific shutter speed value; b) a specific ISO speed and a specific shutter speed value so that they are aligned in the window, the stored instructions directing the CPU to calculate an appropriate shutter speed value for the specific aperture value and the specific ISO speed and to display the shutter speed value in the window in alignment with the specific ISO speed and the specific aperture value; or c) a specific aperture value and a specific ISO speed so that they are aligned in the window, the stored instructions directing the CPU to calculate an appropriate shutter speed value for the specific aperture value and the specific ISO speed and to display the shutter speed value in the window in alignment with the specific ISO speed and the specific aperture value; when the 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 obtain proper exposure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] For illustrative purposes, rather than limiting purposes, aspects, embodiments or examples of the present invention are illustrated in the figures of the accompanying drawings, in which:

[0030] Figure 1 The top view of a rotatable bezel watch of the utility model is shown. In this embodiment, the watch includes a case 1 and a dial 2 placed in the case and visible through an opening of the case. The watch also includes a rotatable bezel 3 arranged 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 mark 4 as an aperture reference indicator, and a plurality of marks 7 corresponding to the camera shutter speed values. Figure 1The illustrated 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 watch strap 10.

[0031] Figure 2 A top view of a rotatable bezel watch of the utility model is shown, and the watch has two sets of shutter speed values ​​set 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 embodiment shown, the rotatable bezel 3 has a set of shutter speeds for ISO speed 100, including a plurality of marks 7 corresponding to cloudy camera shutter speeds, and a set of overlapping marks 11 corresponding to sunny camera shutter speeds. The watch shown also has a set of shutter speeds for ISO speed 400, consisting of a plurality of marks 9 corresponding to cloudy camera shutter speeds, and a plurality of marks 12 corresponding to sunny camera shutter speeds.

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

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

[0034] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] The utility model provides a rotatable bezel watch in certain embodiments, providing a photographer with a quick, convenient and readily available way to determine the desired setting 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 desired setting with the values ​​of the other components, the appropriate setting can be read directly from the watch to obtain the correct exposure.

[0036] Reference Figure 1 In some embodiments, the rotatable bezel watch of the present invention may include a case 1 and a dial 2 disposed in the case so that the dial can be seen 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 also includes a rotatable bezel 3, which is attached to the watch case 2 in a manner that allows the bezel to rotate around the dial axis. The bezel may be movably attached to the watch case by, for example, a bearing or by providing a lip on the bezel, which is located in a groove of the watch case, or by any other means (for example, see U.S. Patent 6,744,695). The watch case may be made of, for example, metal, plastic, or any other durable material known in the prior art. The rotatable bezel may be the same material as the watch case, or a different material.

[0038] In some embodiments of the rotatable bezel watch of the present invention, a watch band 10 may also be included. The watch band is attached to the watch case and includes a buckle or other means for fixing the watch to the user's wrist.

[0039] Refer again Figure 1 In some 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 setting displayed on the dial is 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, 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 also includes a plurality of markings 5 ​​corresponding to the camera aperture values. The aperture values ​​may include full-stop, half-stop, and one-third-stop values. The markings will typically include two or more of F95, F32, F22, F16, F11, F8, F5.6, F4, F2.8, F2, F1.4, F1, and F0.95, although other camera aperture values ​​besides these may also be used. 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 a mark 6 as an aperture reference indicator and a plurality of marks 7 corresponding to camera shutter speed values. The variety of camera shutter speed values ​​includes, for example, two or more values ​​selected from the following group: 32,000, 16,000, 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, which correspond to the reciprocal seconds of the shutter speed (for example, a camera shutter speed value of 8000 means that the camera shutter is open for 1 / 8000 second during the exposure).

[0042] The aperture value, shutter speed value, aperture reference indicator, and ISO speed reference indicator are arranged as indicated on the dial and rotating bezel so that when the rotatable bezel is rotated to place the aperture reference indicator 4 on the rotatable bezel 3 next to the specific aperture value on the dial 2, the ISO speed reference indicator 6 on the dial is aligned 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 obtain the correct exposure (neither overexposed nor underexposed). Those skilled in the art know the appropriate values ​​of different ISO speed settings, aperture values, and shutter speeds to obtain appropriate exposure. A suitable reference for obtaining these combinations is "Understanding Exposure: How to Take Good Photos with Any Camera" (Bryan Peterson, Amphoto Books, Fourth 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 This is a chart created by Daniel Peter from Fotoblog Hamburg (http: / / blog.hamburger-fotospots.de / genialer-spickzettel-fuer-fotografen-als-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 has a rotatable bezel 3 that is rotated so that a shutter speed value of 125 is located next to an ISO speed reference indicator 6 on the dial corresponding to an ISO speed of 100. An appropriate aperture for an ISO speed of 100 and a shutter speed of 1 / 125 second is found among the multiple aperture values ​​5 on the dial next to the aperture reference indicator 4 on the rotating bezel. The appropriate aperture value for an ISO speed of 100 and a shutter speed of 1 / 125 second is F16. If one 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 be properly exposed.

[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 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 arranged so that when the bezel 3 is rotated to align the second ISO speed reference indicator 8 with the desired shutter speed value (second indicated shutter speed value) in the second set of camera shutter speed values ​​9, the aperture reference indicator 4 on the rotating bezel is located next to the appropriate aperture value in the plurality of aperture values ​​5 on the dial. Figure 1 , in this example, the rotating 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, aligned with the ISO speed reference indicator 8 corresponding to the ISO speed 400. In this case, the appropriate shutter speed for obtaining a proper exposure using the ISO speed 400 and the F16 aperture is 500, i.e., 1 / 500 second.

[0045] In certain embodiments, such as Figure 2 As shown, 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 days) and one set for darker conditions (e.g., cloudy days). Figure 2, the bezel 3 has a first set of shutter speeds at ISO speed 100, including a plurality of marks 7 corresponding to shutter speeds for cloudy day cameras, and a second set of overlapping plurality of marks 11 corresponding to shutter speeds for sunny day cameras. The watch shown also has a second set of shutter speeds at ISO speed 400. This second set of shutter speeds includes a plurality of marks 9 corresponding to shutter speeds for cloudy day cameras, and a plurality of marks 12 corresponding to shutter speeds for sunny day cameras. To calculate the appropriate shutter speed for a desired aperture and ISO speed, the bezel is rotated to align the aperture reference indicator 4 with the desired aperture value in the plurality of aperture values ​​5. The ISO speed reference indicator 6 is then aligned with one of the shutter speeds in the plurality of marks 7 for cloudy shutter speeds and one of the shutter speeds in the plurality of marks 11 for sunny shutter speeds. Depending on the lighting conditions, the photographer can select one of these shutter speeds for exposure. Figure 2 The watch illustrated in FIG. 1 also has a second set of shutter speeds with different ISO speeds from the first set of shutter speeds. This second set of shutter speeds includes a first set of shutter speed values ​​of 9 for lower light conditions (e.g., cloudy days) and a second set of shutter speed values ​​of 12 for brighter conditions (e.g., sunny days). In the example shown, the photographer can choose from two shutter speeds of ISO 100 and two shutter speeds of ISO 400 depending on the light conditions.

[0046] In some embodiments, the watch of the utility model may also include a light measuring device that can determine the surrounding lighting conditions by measuring the intensity of 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 camera settings, will result in the camera taking photos with appropriate exposure under the surrounding lighting conditions. In some embodiments, the ISO speed setting, the aperture value, and the shutter speed with and without adjusted lighting readings are displayed on the dial. In some embodiments, the light measuring device can determine the first type of lighting conditions or the second type of lighting conditions.

[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 a camera shutter speed value, while the rotatable bezel includes a camera aperture value and an ISO speed reference indicator. The positions of the respective values ​​are arranged so that when the rotatable bezel is rotated to place a particular aperture value on the rotatable bezel in alignment with the aperture reference indicator on the dial, the ISO speed reference indicator on the rotatable bezel is aligned with the appropriate shutter speed value. The watch is used in the same manner as the watch described above.

[0048] The utility model also provides a smart watch.

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

[0050] The electronic display screen can be enclosed 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) display screens, including organic light emitting diode (OLED) display screens, active matrix organic light emitting diode (AMOLED) display screens, liquid crystal display screens (LCD), etc. In some embodiments, the display screen is a touch screen display screen.

[0051] These "smart watch" embodiments generally include a central processing unit (CPU) configured to execute stored instructions and a memory device that stores CPU executable instructions. The CPU and the memory device can be connected via a bus. For example, the CPU can be a single-core processor, a multi-core processor, or any other configuration. The memory device can include a random access memory (RAM), a read-only memory (ROM), or any other suitable storage system. In some embodiments, the memory device includes a 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 for displaying dial markings on at least a portion of the electronic display screen. The dial marking instructions may include, for example, instructions for displaying a plurality of markings corresponding to the camera aperture value and an ISO speed reference indicator corresponding to the first ISO speed setting. In some embodiments, the watch will include a physical bezel that rotates around the axis of the display screen; the bezel will include an aperture reference indicator and a plurality of markings corresponding to the camera shutter speed value. The aperture value, shutter speed value, aperture reference indicator, and ISO speed reference indicator are arranged in such a manner that when the bezel is rotated to place the aperture reference indicator on the rotating bezel adjacent to a specific aperture value on the dial, the ISO speed reference indicator on the dial is adjacent to a specified shutter speed value on the rotating bezel. When the specified shutter speed value, the specific aperture value, and the first ISO speed setting are set in the camera, the camera will take a photo with a proper exposure.

[0053] In other embodiments, the rotating bezel is a "virtual" bezel. In these embodiments, the watch includes a memory device storing instructions executable by the CPU. The stored instructions include rendering instructions to display dial markings on a portion of the electronic display screen and to display a virtual bezel on a second portion of the electronic display screen, wherein the virtual bezel surrounds the dial markings displayed on a portion of the electronic display screen and arranged axially around the dial portion. The dial markings include a plurality of markings corresponding to the camera aperture values ​​and an ISO speed reference indicator corresponding to the 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 the camera shutter speed values. The aperture values, shutter speed values, aperture reference indicator, and ISO speed reference indicator are arranged in such a manner that when the virtual bezel is rotated to place the aperture reference indicator on the bezel adjacent to a specific aperture value on the dial, the ISO speed reference indicator on the dial is adjacent to a specified shutter speed value on the bezel. When the specified shutter speed value, the specific aperture value, and the first ISO speed setting are set in the camera, the camera will capture a photo with a proper exposure. In addition, the utility model also provides an embodiment of exchanging marks on a virtual bezel and a dial. For example, in some embodiments, the dial includes a plurality of marks corresponding to the camera aperture value and at least a first ISO speed reference indicator corresponding to the first ISO speed setting, while the virtual bezel includes an aperture reference indicator and a plurality of marks corresponding to the camera shutter speed value. As another example, the dial may include an aperture reference indicator and a plurality of marks corresponding to the camera shutter speed value, while the virtual bezel includes a plurality of marks corresponding to the camera aperture value and at least a first ISO speed reference indicator corresponding to the 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 to be executed by the CPU, or to input information to be input into the stored instructions. For example, in an embodiment on an electronic display screen that displays a virtual bezel, the user interface may cause the virtual bezel to (virtually) rotate around the dial. The user interface may include a stem that changes the instructions to be executed by the CPU when the user turns it (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 touch screen display. In some embodiments that include a touch screen 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 located along the portion of the electronic display screen that displays the virtual bezel. The touch sensors are connected to a touch controller that receives data from the touch sensors. The CPU then processes the data.

[0055] The user interface can also be configured to allow the user to select a specific ISO speed reference indicator and a corresponding plurality of camera shutter speed values ​​for display on the electronic display screen. For example, if the 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 value 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 rotating bezel, either physically or virtually displayed on an electronic display. An example of such an embodiment is Figure 4 As shown, a "smart watch" is shown, which includes a watch box 1 and an electronic display screen placed in the watch box. In these embodiments, the watch includes a memory device storing instructions executable by the CPU. The stored instructions include display instructions to render dial markings on a portion of the electronic display screen and render a photographic exposure calculator 6 on a second portion of the electronic display screen. 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 based on user input. The user can set two of these values ​​using user input 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 In the example of FIG. 8 , the user may have set an ISO speed of 800 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 window 8. When the designated shutter speed value, aperture value, and ISO speed setting aligned in window 8 are set in the camera, the camera will take a photo with a proper exposure.

[0057] In some embodiments, the watch of the utility model may also include a light measuring device that is 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 settings on the camera, will result in the camera taking photos with appropriate exposure in the ambient light. In some embodiments, the ISO speed settings, aperture values, and shutter speeds for both light adjusted and unadjusted readings are displayed on the dial.

[0058] The utility model also provides a software application for a smart watch for calculating an appropriate photographic exposure. The application may include instructions, and when these instructions are stored in a memory device of a watch including 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 the display instructions from the CPU to the electronic display screen, the instructions include display instructions for rendering dial marks on a portion of the electronic display screen. In some embodiments, the display instructions also cause a virtual bezel to be displayed on a second portion of the electronic display screen. The virtual bezel is axially placed around the dial portion of the display portion and can be (virtually) rotated about the display axis of the dial portion. In some embodiments, the dial marks include a series of marks corresponding to the camera aperture value, and an ISO speed reference indicator corresponding to the first ISO speed setting; in these embodiments, the rotatable bezel includes an aperture reference indicator and a series of marks corresponding to the shutter speed value. In other embodiments, the dial marks include an aperture reference indicator and a series of marks corresponding to the shutter speed value, and the virtual bezel includes a series of marks corresponding to the camera aperture value and an ISO speed reference indicator corresponding to the first ISO speed setting. When the virtual bezel is virtually rotated so that the aperture reference indicator is adjacent to a specific aperture value on the dial, the ISO speed reference indicator is positioned adjacent to a specified shutter speed value on the dial, and when this specified shutter speed value, the specific aperture value and the first ISO speed setting are set in the camera, the camera will take a photo with proper exposure.

[0059] In one example, an aperture reference indicator and a series of markings corresponding to shutter speed values ​​are located on a rotatable bezel, and the instructions instruct the electronic display to arrange the aperture values, the aperture reference indicator, and the ISO speed reference indicator so that when the rotatable bezel is rotated to place the aperture reference indicator on the rotating bezel adjacent to a specific aperture value on the dial, the ISO speed reference indicator on the dial is positioned adjacent to a specified shutter speed value on the rotating bezel. When the camera is set to this specified shutter speed value, the specific aperture value, and the first ISO speed setting, a properly exposed photograph will be obtained.

[0060] In other embodiments, the instructions provided by the software application of the present invention, when stored in a storage device of a watch including 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 the display instructions from the CPU to the electronic display screen, include display instructions for rendering dial marks on a portion of the electronic display screen and display instructions for rendering a 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 values, shutter speed values, and ISO speeds can be changed according to user input. The application also includes instructions that allow the user to set these two values ​​using user input 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 instruct 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. Likewise, when the user aligns a specific ISO speed and a specific shutter speed value in the window using user input, the stored instructions will instruct the CPU to calculate the appropriate aperture value for the specific shutter speed and the specific ISO speed, and to display the appropriate aperture value in the window in alignment 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 instruct the CPU to calculate the appropriate shutter speed value for the specific aperture value and the specific ISO speed, and to display the appropriate shutter speed value in the window in alignment with the specific ISO speed and the specific aperture value. In each case, when the shutter speed value, aperture value, and ISO speed settings are aligned with each other in the window and set in the camera, the photo taken by the camera will have the appropriate exposure.

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

[0062] Photographers often wish to prioritize a certain element of the exposure triangle to achieve a desired photographic effect. For example, if the photographer wants to prioritize a fast shutter speed to capture a fast-moving subject, the photographer must determine the aperture value and ISO speed setting appropriate for that shutter speed to achieve a good exposure. The watch of the utility model 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 determine the appropriate aperture value simply by looking at the watch and identifying which aperture value is adjacent to the aperture reference indicator. Alternatively, if focal length is the photographer's primary concern 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 is aligned with the ISO speed reference indicator. The setting indicated by the rotating bezel watch is then input into the camera, which will then take a photo with the proper 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 obtaining 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 wishes to obtain a photograph with a deep depth of field and a sharp 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 aligned 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 utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

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, the dial being visible through an opening in the watch case; c) a rotatable bezel attached to the watch case such that the rotatable bezel can rotate axially around the dial; in: i) The dial comprises: a plurality of markers corresponding to the aperture values ​​of the camera; and at least one first ISO speed reference indicator corresponding to a first ISO speed setting; The rotatable bezel comprises: an aperture reference indicator; and at least a first set of indicia corresponding to camera shutter speed values; or, ii) The dial comprises: an aperture reference indicator; and at least a first set of indicia corresponding to a first set of camera shutter speed values; The rotatable bezel comprises: a plurality of markers corresponding to the aperture values ​​of the camera; and at least one first ISO speed reference indicator corresponding to a first ISO speed setting; Wherein, the markings corresponding to the aperture value, the shutter speed value, the aperture reference indicator, and the first ISO speed reference indicator are arranged in such a manner that, when the rotatable bezel is rotated to place the aperture reference indicator next to a specific aperture value, the first ISO speed reference indicator is located next to the indicated shutter speed value, wherein when the indicated shutter speed value, the specific aperture value, and the first ISO speed setting are set in the camera, a photograph taken by the camera will have an appropriate exposure.

2. The watch according to claim 1, characterized in that: The multiple marks corresponding to the camera aperture values ​​include one or more full-stop, half-stop and one-third-stop values.

3. The watch according to claim 1, characterized in that: a) The dial comprises: i) a plurality of marks corresponding to the aperture values ​​of the camera; 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 comprises: iv) aperture reference indicator; v) a first set of indicia corresponding to camera shutter speed values; and vi) at least a second set of indicia corresponding to a second set of camera shutter speed values; or, b) The dial comprises: i) aperture reference indicator; ii) a first set of indicia 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 comprises: iv) a plurality of marks corresponding to the aperture values ​​of the camera; 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 in such a manner that when the rotatable bezel is rotated to position the aperture reference indicator next to a specific aperture value, the second ISO speed reference indicator is located next to a second indicated shutter speed value in the second set of camera shutter speed values, wherein when the second indicated shutter speed value, the specific aperture value, and the second ISO speed setting are set in the camera, a photograph taken by the camera will have an appropriate exposure.

4. 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 in such a manner that when the rotatable bezel is rotated to position the aperture reference indicator next to a specific aperture value, the first ISO speed reference indicator is aligned with one indicated shutter speed value in the first set of camera shutter speed values ​​and a second indicated shutter speed value in the second set of camera shutter speed values; wherein: a) when the first indicated shutter speed, the specific aperture value, and the first ISO speed setting are set in the camera, the photograph taken by the camera will have a proper exposure under the first type of lighting conditions; and b) When the second indicated shutter speed, 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 under the second type of lighting conditions.

5. The watch according to claim 4, characterized in that: The watch further includes a light measuring device configured to measure an intensity of light to which the light measuring device is exposed to thereby determine one or both of the first type or the second type of lighting conditions.

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

7. The watch according to claim 6, characterized in that: The watch further comprises: a) a central processing unit (CPU) configured to execute stored instructions; b) a memory device containing stored instructions executable by the CPU, wherein the stored instructions include display instructions for rendering dial markings on an electronic display screen, the dial markings including 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.

8. A watch for calculating photographic exposure, comprising: a) a watch case; b) an electronic display screen enclosed in a watch case, wherein 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 to be executed by the CPU; f) a memory device containing storage instructions executable by the CPU, wherein the storage instructions include rendering instructions: i) displaying dial markings on a portion of the electronic display, and, ii) displaying a virtual bezel on another portion of the electronic display screen, wherein the virtual bezel surrounds the display of the dial portion and is capable of axially rotating on the electronic display screen of the dial portion in response to user input through the user interface; g) Among which: i) the dial markings include a plurality of markings corresponding to the camera aperture values ​​and a first ISO speed reference indicator corresponding to the first ISO speed setting; and the virtual bezel includes an aperture reference indicator and a plurality of markings corresponding to the 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; wherein 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 virtual bezel is virtually rotated to place the aperture reference indicator next to a specific aperture value, the first ISO speed reference indicator is located next to the indicated shutter speed value, wherein when the indicated shutter speed value, the specific aperture value, and the first ISO speed setting are set in the camera, a photo taken by the camera will have proper exposure.

9. A watch for calculating photographic exposure, comprising: a) a watch case; b) an electronic display screen enclosed in a watch case, wherein 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, wherein 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 to be executed by the CPU; f) a display interface for transmitting 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 the user can align the following using user input: i) a specific aperture value and a specific shutter speed value, the stored instructions will instruct the CPU to calculate an appropriate ISO speed to accommodate the specific aperture value and the specific shutter speed, and to display the ISO speed in the window aligned with the specific aperture value and the specific shutter speed value; ii) a specific ISO speed and a specific shutter speed value, the stored instructions will instruct the CPU to calculate an appropriate aperture value to accommodate the specific shutter speed and the specific ISO speed, and to display the aperture value in the window in alignment with the specific ISO speed and the specific shutter speed value; iii) a specific aperture value and a specific ISO speed, the stored instructions will instruct the CPU to calculate an appropriate shutter speed value to accommodate the specific aperture value and the specific ISO speed, and to display the shutter speed value in the window in alignment with the specific ISO speed and the specific aperture value; Among them, when a specific shutter speed value, a specific aperture value, and a specific ISO speed setting are set in the camera, the photo taken by the camera will have proper exposure.

Images