Shutter release for camera and camera

Abstract

To provide a shutter release for a camera to provide expanded control functions on the camera.SOLUTION: Provided is a shutter release 10 for a camera having: a base body 12; an operation element 14 movably supported by the base body along an adjustment route between a stationary position and a terminal position; a spring element 16 for biasing the operation element in a direction of the stationary position; a magnetic field sensor 22 configured to generate an output signal which is the scale of a relative position of the operation element to the base body; and an evaluation unit 30 configured to receive the output signal from the magnetic field sensor, and connected to the magnetic field sensor. The evaluation unit is further configured to specify a relative speed and / or a relative acceleration of the operation element to the base body on the basis of the sequence of received output signals.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The invention relates to a shutter release for a camera having a base body, an operating element supported on the base body so as to be movable along an adjustment path between a rest position and an end position, a spring element biasing the operating element in the direction of the rest position, a magnetic field sensor device configured for generating an output signal which is a measure of the relative position of the operating element with respect to the base body, and an evaluation unit connected to the magnetic field sensor arrangement and configured for receiving the output signal from the magnetic field sensor arrangement. [Background technology]

[0002] A typical shutter release is disclosed, for example, in EP 1 845 542. In the case of the shutter release shown there, the strength of the magnetic field generated by a magnetic element arranged on the push button is detected by a magnetoelectric converter in order to determine the distance of the push button from the substrate. In this way, a multi-stage shutter release can be realized, which besides the rest position can define a first and a second stage. For example, in the first stage - for example when the push button is pressed halfway - the focusing function of the camera can be activated, and in the second stage - for example when the push button is pressed all the way - the release function for recording an image of the camera can be activated.

[0003] However, such conventional shutter releases can only control a limited number of different camera functions. It is also conceivable to increase the number of possible functions by increasing the number of intermediate positions that are evaluated. However, this entails the risk of incorrect operation, since the evaluated positions are often located so close to one another that a reliable distinction is no longer possible for the user. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] European Patent No. 1845542 Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE PRESENT EMBODIMENT It is an object of the present invention to provide a shutter release for a camera which provides expanded control over the camera. [Means for solving the problem]

[0006] This problem is solved by a shutter release having the features of claim 1. In the case of a shutter release according to the invention, it is provided that the evaluation unit is further configured for determining the relative velocity and / or the relative acceleration of the operating element with respect to the base body on the basis of the sequence of received output signals.

[0007] In the case of the shutter release according to the invention, the actuating element can be moved from the rest position in the direction of the end position by the user exerting a force on the operating element against the biasing force of the spring element. The output signal can be provided by the magnetic field sensor device continuously or at time intervals. In the case of continuous provision, for example, a scanning of the output signal can take place in the evaluation unit. Correspondingly, the sequence of received output signals is a sequence of output signals received or scanned at different times. In order to determine the operating speed of the operating element, said sequence must include at least two output signals determined at different times. However, preferably, the speed of the operating element is determined from more than two output signals in order to increase the accuracy. The relative speed can then be determined directly on the basis of the output signal sequence or indirectly, i.e. for example by means of an intermediate step in which the relevant relative positions are first determined on the basis of the respective output signals of said sequence, of course taking into account in both cases the time elapsed between the generation of the respective output signals.

[0008] By alternatively or additionally determining the relative acceleration of the operating element, further movement characteristics of the operating element can be evaluated. The relative acceleration can be determined directly on the basis of the output signal or indirectly on the basis of a plurality of respective values ​​of the relative position or relative velocity determined from the output signal. In the simplest case, the output signal sequence for which the acceleration determination is to be performed must therefore contain at least three output signals. In the case of an indirect acceleration determination based on the relative velocity, at least two velocity values ​​are required.

[0009] Thus, apart from the possible direct evaluation of the relative position as a basis for outputting control commands to the camera, the shutter release according to the invention additionally offers the possibility of providing one or more further control commands for the camera based on the determined relative speed and / or relative acceleration, which allows a camera equipped with the shutter release according to the invention to be used in a more versatile manner.

[0010] An exemplary application may be, for example, that the speed is used to accelerate the release process of the camera, i.e. the actual image recording. Thus, in the case of the conventional shutter release, which was exemplarily described at the beginning, the focus process is first started when the shutter release is half-pressed, and the actual image is recorded only when the shutter release is fully pressed. This may cause a delay in the image release, which may be detrimental, in particular, when recording spontaneous snapshots of moving objects, because, due to this delay, the object may no longer be captured, or at least may no longer be captured in the desired position. On the other hand, with the shutter release according to the invention, the user has the option of triggering an accelerated release by a relatively quick actuation of the shutter release - the actuation element reaches a higher speed - in which, for example, the focus process is skipped or released already before the actual release position is reached, and thus starting the actual image recording at an earlier time point - counted from the start of the release process.

[0011] According to another advantageous embodiment, the evaluation unit is configured to output at least one respective control signal or control command, which indicates a respective value or value range for at least one respective relative position, at least one respective relative velocity and / or at least one respective relative acceleration. The respective control signal can be output, for example, when the operating element is in a predefined position or within a predefined position range and / or when the operating element falls below or exceeds a predefined threshold for the relative velocity and / or a predefined threshold for the relative acceleration. The control signal can thus signal to the camera connected to the shutter release that the relative velocity of the operating element has exceeded a predefined minimum velocity. The camera can then, after receiving such a control signal, for example, perform a correspondingly associated function or be placed in a corresponding operating mode. The control signal can be output periodically or only when the value or value range for the relative position, the relative velocity or the relative acceleration has changed significantly, for example below or above a predefined threshold, or has reached or left a predefined value range.

[0012] According to another advantageous embodiment, the magnetic field sensor device has a permanent magnet arranged on the operating element and at least one, preferably two, magnetic field sensors arranged on the base body. The magnetic field sensors can in particular detect the magnetic field strength and / or the orientation of the magnetic field generated by the permanent magnet, which are representative of the respective relative positions of the operating elements, as well as changes in the magnetic field strength or orientation occurring when the operating elements are moved. If, instead of only one magnetic field sensor, two or more magnetic field sensors are provided, the resulting redundancy can increase the sensor accuracy and eliminate the influence of external magnetic fields, thereby in particular reducing the risk of outputting erroneous control signals. The magnetic field sensors can, for example, be arranged laterally of the permanent magnet and / or on the end faces - respectively with respect to the longitudinal axis of the operating element extending along the movement direction.

[0013] Advantageously, at least one magnetic field sensor is a magnetoresistive magnetic field sensor. Magnetoresistive magnetic field sensors are used for measuring magnetic fields based on resistance. By suitable geometric arrangement of a multi-layer structure or layer stack, other physical quantities such as path, angle or current strength can be indirectly detected. Magnetoresistive magnetic field sensors are based on the magnetoresistive effect, where a change in electrical resistance in the structure is caused by the application of an external magnetic field. Magnetic field sensors with a relatively high magnetoresistance effect, which can be described by the quotient of the change in resistance and the resistance without the presence of an external magnetic field, are based on the giant magnetoresistance effect (GMR effect, from the English "giant magnetoresistance"), the colossal magnetoresistance effect (CMR effect, from the English "colossal magnetoresistance") or the tunnel magnetoresistance effect (TMR effect, from the English "tunnel magnetoresistance"). Another type of magnetic field sensor is based on the anisotropic magnetoresistance effect (AMR effect, from the English "anisotropic magnetoresistance") or the Hall effect.

[0014] The invention further relates to a camera with a shutter release according to at least one of the inventive or advantageous embodiments, characterized in that the camera comprises a plurality of operating modes, the evaluation unit is configured for outputting at least one respective control command indicating a respective value or value range for at least one respective relative position, at least one respective relative velocity and / or at least one respective relative acceleration, and the camera is operated in the respective operating mode depending on the control command. The respective operating modes mentioned include, for example, focus and focus, single image recording, sequence recording (i.e. film recording in which a film sequence or video is recorded) or continuous image recording (i.e. recording of a series or succession of single images at a lower image recording speed than sequence recording). Some advantages of such a camera with an inventive or advantageous shutter release have already been mentioned at the beginning when describing the advantages of the shutter release. In general, with a camera according to the invention, more functions can be controlled exclusively via the operating elements of the shutter release compared to a camera with a conventional shutter release.

[0015] According to an advantageous embodiment of the camera, the plurality of operating modes comprises at least one secondary operating mode and at least one record operating mode, the secondary operating mode being selected from an operating mode group comprising focusing the camera and determining, i.e. specifying and / or setting, at least one exposure parameter, e.g. exposure time, light sensitivity (ISO value) or aperture (F-stop), the record operating mode being selected from an operating mode group comprising recording of a single image, recording of an image series and recording of an image sequence, the evaluation unit of the shutter release outputs a first control command for activating the secondary operating mode if the operating element is moved from a rest position to a first relative position and the determined speed or the determined acceleration does not exceed a predefined threshold before reaching the first relative position, and the evaluation unit of the shutter release outputs a second control command for immediately activating the record operating mode if the operating element is moved from a rest position to a first relative position and the determined speed or the determined acceleration exceeds a predefined threshold before reaching the first relative position. The list of operating modes in the respective groups is not determinative.

[0016] For example, when the operating element is operated slowly after the activation of the secondary operating mode, the recording operating mode can be subsequently activated if the operating element is moved to a second relative position, the second relative position being located after the first relative position in the direction of movement. The second relative position can in particular correspond to an end position. That is to say, if the operating element is operated at a relatively low speed, the focusing process is first initiated when the first relative position is reached. Only when the operating element is moved further in the direction of the end position does the actual recording of the image, image series or image sequence take place. On the other hand, if the operating element is operated at a relatively high speed or high acceleration from the beginning, this signals to the camera, for example, that a snapshot should be recorded, and it is important to start the recording process immediately as soon as possible without delay. In this context, the immediate activation of the recording operating mode means, in particular, that the activation of the secondary operating mode is omitted or skipped.

[0017] According to another advantageous embodiment of the camera, the operating modes include at least a series image recording operating mode, in which the camera continuously records each image, and a memory operating mode, in which the last recorded image is transferred to the memory, in which, when the operating element is moved from the rest position to the first relative position, the evaluation unit of the shutter release outputs a third control command for activating the series image recording operating mode, and when the operating element is moved from the first relative position to the second relative position, the evaluation unit of the shutter release outputs a fourth control command for activating the memory operating mode, in which the second relative position is located after the first relative position in the direction of movement and here is, for example, identical to the end position. In the series image recording operating mode, the camera continuously records single images at predefined time intervals, which single images are not yet stored. When the memory operating mode is then activated, the last recorded single image of the image series is transferred to a volatile or non-volatile memory.

[0018] Depending on the requirements, it can be set or selected whether the shutter release controls switching between the secondary and record operating modes, or between the series image record and memory modes of operation.

[0019] Advantageous developments of the invention are also described in the dependent claims, the description and the drawings, which contain a number of combined features, which a person skilled in the art can expediently consider individually and combine into other meaningful combinations.

[0020] The invention is exemplarily illustrated below by means of drawings, in which the figures should not be understood to be to scale. [Brief description of the drawings]

[0021] [Figure 1] 1 is a schematic cross-sectional view of a shutter release according to an embodiment; [Diagram 2] 1 is a schematic cross-sectional view of a shutter release according to an embodiment; [Diagram 3]1 is a schematic cross-sectional view of a shutter release according to an embodiment; [Figure 4] 1 is a schematic cross-sectional view of a shutter release according to an embodiment; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Figures 1 to 4 show a shutter release 10 which can be integrated into a camera, not shown. The shutter release 10 comprises a cup-shaped base body 12 and an operating element 14 which is supported on the base body 12 so as to be movable along an adjustment path between a rest position and an end position. Arranged in the base body 12 is a spring element 16 which cooperates with the operating element 14 and is formed as a helical spring, which biases the operating element 14 in the direction of the rest position shown in Figure 1. The arrangement of the spring element 16 between the base body 12 and the operating element 14 is shown only diagrammatically, without stop parts which may be necessary.

[0023] The shutter release 10 further comprises a magnetic field sensor arrangement which comprises a permanent magnet 18 arranged in a recess below the operating element 14 and a magnetic field sensor 22 arranged on a circuit board 20 which is arranged below the base body 12. The magnetic field sensor 22 detects the magnetic field strength or changes in the magnetic field strength of the magnetic field generated by the permanent magnet 18 and transmits an output signal depending on the detected magnetic field strength or the detected changes in the magnetic field strength to an evaluation unit 30 which is connected to the magnetic field sensor 22.

[0024] At the bottom of the base body 12, an elastic element 24 can be arranged which, by suitable selection of its material and its dimensions, is arranged and shaped in such a way that, when the operating element moves in the direction of the end position shown in FIG. 4, it exerts an additional reaction force on the operating element 14 in addition to the restoring force of the spring element 16 from the moment an intermediate position, which is approximately halfway between the adjustment positions shown in FIGS. 2 and 3, is reached.

[0025] Two or more magnetic field sensors may be provided instead of one magnetic field sensor 22. Alternatively or additionally to the bottom placement of the magnetic field sensor 22, it may be placed on the sidewall of the substrate 12 or at any other suitable location.

[0026] The evaluation unit 30 can be configured to determine the relative position of the operating element 14 with respect to the substrate 12 based on an output signal received by the magnetic field sensor device indicative of the magnetic field strength measured by the magnetic field sensor 22. This can be done, for example, by means of a pre-specified calibration function or a correspondence table.

[0027] Based on the succession of received output signals, the evaluation unit 30 can determine the relative velocity and / or the relative acceleration of the operating element 14 with respect to the substrate 12. This can be done directly, i.e. immediately on the basis of the output signals - taking into account the time elapsed between the reception of the respective output signals - or indirectly, based on a pre-determined relative position.

[0028] The sequence must include at least two output signals or relative positions for velocity measurement and at least three output signals or relative positions for acceleration determination. Optionally, the determination of the relative acceleration can also be made indirectly based on at least two pre-determined velocity values.

[0029] The evaluation unit 30 can further be configured to determine, based on the at least one received output signal, a reaction force acting on the operating element 14 and generated by the elastic element 24. The reaction force is thus determined indirectly, i.e. not by means of a load cell, but based on a predefined force-displacement relationship resulting in particular from the spring constant or modulus of elasticity of the elastic element 24 and its dimensions, for example mathematically based on the aforementioned parameters, or based on an experimentally determined characteristic curve or look-up table which represents a force-displacement relationship in the form of a dependence of the reaction force on the respective value of the output signal of the magnetic field sensor or on the relative position of the operating element 14 determined based on the output signal.

[0030] The restoring force of the spring element 16 is significantly lower than the reaction force generated by the elastic element 24. When operating the operating element 14, the user first feels a relatively small restoring or reaction force in the adjustment position shown in Figures 1 and 2. However, as soon as the operating element 14 comes into contact with the elastic element 24, the restoring or reaction force increases by a larger amount depending on the adjustment path, which becomes noticeable as a resistance when transitioning from the adjustment position according to Figure 2 to the adjustment position according to Figure 3. If the operating element 14 is moved further downwards according to the transition from Figure 3 to Figure 4, the restoring or reaction force increases further until an end position is reached in which further compression of the elastic element 24 is no longer possible even with significant force or a stopper limits the adjustment path.

[0031] In the following, various methods of controlling the camera by means of the shutter release 10 are described exemplarily, which can also be combined with one another in an appropriate manner. The camera can be controlled, for example, by the evaluation unit 30 transmitting corresponding control signals to a control unit of the camera, which can control various camera operating modes. According to one variant, the evaluation unit 30 of the shutter release 10 and the control unit of the camera can also be integrated into a common evaluation and control unit. In particular, the evaluation unit 30 of the shutter release 10 can be formed by a logical or physical subunit of the evaluation unit or control unit of the camera.

[0032] The control signals or control commands output by the evaluation unit can indicate a respective value or value range for at least one respective relative position, at least one respective relative velocity and / or at least one respective relative acceleration. Thus, for example, a respective control signal can signal that the operating element is in a predefined position or within a predefined position range. Furthermore, the control signal can also signal above or below a predefined threshold value for the relative velocity and / or the relative acceleration.

[0033] The camera can be operated in a number of operating modes, which can include, for example, focusing, single image recording, series image recording, sequence image recording or exposure metering. The above list is not conclusive. Furthermore, the control signals or control commands can also change the parameters of the respective operating mode, for example the image recording speed for series image recording, i.e. the number of images or frames recorded per unit time.

[0034] According to exemplary operating modes, the camera can be operated in a secondary operating mode and a record operating mode. The secondary operating mode can, for example, include determining, i.e. specifying and / or setting, a focusing and / or at least one exposure parameter, e.g. exposure time, light sensitivity (ISO value), aperture (F-number). In the record operating mode, for example, a single image, an image series or an image sequence can be recorded, the desired record operating mode being preselected, for example, by means of a corresponding operating element or operating menu. For example, the evaluation unit 30 can output a first control command for activating the secondary operating mode if the operating element 14 is moved from a rest position (FIG. 1) to a first relative position (FIG. 2) and at the same time the determined speed and / or acceleration does not exceed a predefined threshold before reaching the first relative position. However, if the operating element 14 is operated with a speed or acceleration above a predefined threshold before reaching the first relative position, it can output a second control command for activating the record operating mode immediately, i.e. without prior activation of the secondary operating mode.

[0035] This control variant improves, for example, the recording of snapshots, since the user can skip time-consuming focusing or exposure measurements by a bold operation of the shutter release 10. Even without an intermediately arranged focusing that can be skipped if necessary, the consideration of the acceleration can accelerate the release, i.e. the start of the image recording. For a normal shutter release 10, the adjustment path between the rest position and the adjustment position, at which the release process is usually started, can thus be about 1.25 mm. This can result in a period of 10-20 ms passing between the start of the operating movement and the actual release. However, if the speed or acceleration of the operating element 14 are both taken into account, in the event of a bold operation in which the user moves the operating element 14 as quickly as possible in the direction of the release position, image recording can already be started before the release position is reached, based on the detection of exceeding a threshold value for the speed or acceleration. This allows the release delay to be reduced by a few milliseconds, which makes it possible to determine whether the subject can be captured in the desired movement phase when recording a fast-moving scene.

[0036] In another exemplary operating mode of the camera, the multiple operating modes of the camera can include at least a series image recording operating mode, in which the camera continuously records each image, and a memory operating mode, in which the last recorded image is transferred to a memory. When the actuating element 14 is moved from the rest position 14 to the first relative position, the shutter release 10 can output a third control command activating the series image recording operating mode. In this series image recording operating mode, the camera continuously records single images at predefined time intervals, for example one image every 500 ms. When the actuating element 14 is moved from the first relative position to the second relative position, the shutter release 10 outputs a fourth control command activating the memory operating mode. Here, the last recorded single image of the series is transferred to a volatile or non-volatile memory.

[0037] When describing the different operating modes, it will be explained below how the elastic element 24 can assist in the selection of the respective operating mode.

[0038] In an exemplary operating mode, the camera can be operated in a number of recording operating modes, which include, for example, recording a single image, recording a sequence of images and recording a sequence of images. The intermediate position of the shutter release 10 is defined by the operating element 14 just coming into contact with the elastic element 24, whereby an additional reaction force is formed. Thus, for example, the single image recording operating mode can be activated when the reaction force reaches a first value or when the operating element reaches a first relative position that is located between the rest position and the intermediate position, which corresponds to this value of force. This can, for example, correspond to the situation in FIG. 2.

[0039] If the operating element 14 is pressed down harder, the series image recording operating mode is activated instead of the single image recording operating mode when the evaluation unit 20 determines that the reaction force has reached at least a second value or that the operating element 14 has reached a second relative position that is located between the intermediate position and the end position, which corresponds to this value of force. This can correspond, for example, to the state of FIG.

[0040] Now, if the operating element 14 is pressed further down, corresponding to an adjustment position located between the adjustment positions of FIG. 3 and FIG. 4, a third control command can be output by the evaluation unit 30 for setting the image recording speed for the series image recording operating mode when the reaction force exceeds the second value by a predefined amount or when the operating element 14 reaches a relative position corresponding to this value of force. In particular, a quasi-continuous setting of the image recording speed can also be performed depending on the reaction force, i.e. the harder the user presses down on the operating element 14, the higher the image recording speed is set and vice versa. For example, if the reaction force reaches a second number, for example an image series is recorded at a predefined minimum image recording speed. If the operating element 14 is pressed further down, the image recording speed is increased stepwise to a predefined maximum image recording speed, either continuously or stepwise depending on the reaction force. According to one variant, it is also possible to switch from the series image recording operating mode to the sequence recording operating mode when a predefined reaction force is reached - the corresponding image reproduction speed reaches or exceeds a predefined threshold value, for example 12 fps (frames per second).

[0041] The shutter release 10 may comprise an actuator 26 (only shown in FIG. 1 ), which in an embodiment is arranged laterally on the base 12 and is provided for generating haptic feedback in the form of shocks or vibrations that can be felt by a user upon finger contact with the shutter release 10 or through the camera housing. To generate the haptic feedback, the actuator 26 may be formed, for example, as a solenoid driver, an eccentric driver or a piezoelectric element, in which case a firing pin is moved towards the base 12 in order to generate the haptic feedback. The haptic feedback may, for example, be generated whenever a given control command is output. The respective haptic feedbacks may differ from each other for different control commands, for example in terms of intensity, frequency or rhythm.

[0042] Alternatively or additionally, acoustic feedback for the output control commands can be generated by a speaker built into the camera.

[0043] Via the optional configuration menu or corresponding functions, it is possible to set or adapt within a wide range which operating modes of the camera should be activated by the respective characteristic operating modes - which can be obtained in a configurable manner from different positions, velocities or accelerations of the operating elements - or how the operating modes should be parameterized. [Explanation of symbols]

[0044] 10 Shutter Release 12 Base 14 Operational elements 16 Spring elements 18 Permanent Magnets 20 Circuit Board 22 Magnetic Field Sensor 24 Elastic Elements 26 Actuator 30 Evaluation Units

Claims

1. A shutter release (10) for a camera, comprising a base (12), an operating element (14) supported on the base (12) so as to be movable along an adjustment path between a rest position and an end position, a spring element (16) biasing the operating element (14) towards the rest position, a magnetic field sensor arrangement (22) configured for generating an output signal which is a measure of the relative position of the operating element (14) with respect to the base (12), and an evaluation unit (30) connected to the magnetic field sensor arrangement (22) and configured for receiving the output signal from the magnetic field sensor arrangement (22), The shutter release (10), characterized in that the evaluation unit (30) is further configured to determine a relative velocity and / or a relative acceleration of the operating element (14) with respect to the substrate (12) based on the sequence of received output signals.

2. 2. The shutter release (10) of claim 1, characterized in that the evaluation unit (30) is configured to output at least one respective control signal indicative of a respective value or value range for at least one respective relative position, at least one respective relative velocity and / or at least one respective relative acceleration.

3. 3. The shutter release (10) according to claim 1 or 2, characterized in that the magnetic field sensor device (22) has a permanent magnet (18) arranged on the operating element (14) and at least one, preferably two, magnetic field sensors (22) arranged on the base body (12).

4. 4. The shutter release (10) of claim 3, characterized in that the at least one magnetic field sensor (22) is a magnetoresistive magnetic field sensor (22).

5. 5. A camera having a shutter release (10) according to any one of claims 1 to 4, characterized in that the camera comprises a plurality of operating modes, and the evaluation unit (30) is configured for outputting at least one respective control command indicative of a respective value or value range for at least one respective relative position, at least one respective relative velocity and / or at least one respective relative acceleration, and the camera is operated in the respective operating mode depending on the control command.

6. the plurality of operation modes includes at least one secondary operation mode and at least one record operation mode, the secondary operation mode being selected from a group of operation modes including focusing the camera and determining at least one exposure parameter, and the record operation mode being selected from a group of operation modes including recording a single image, recording a series of images, and recording a sequence of images; when the operating element (14) is moved from a rest position to a first relative position and, before reaching the first relative position, the determined velocity or the determined acceleration does not exceed a predefined threshold, the shutter release (10) outputs a first control command activating a secondary operating mode, 6. The camera of claim 5, wherein when the operating element (14) is moved from a rest position and before the first relative position is reached, the shutter release (10) outputs a second control command for immediately activating the recording operating mode when the determined velocity or the determined acceleration exceeds a predetermined threshold.

7. the plurality of operating modes including at least a series image recording operating mode in which the camera continuously records each image, and a memory operating mode in which the last recorded image is transferred to memory; when the operating element (14) is moved from the rest position to the first relative position, the shutter release (10) outputs a third control command to activate a series image recording operating mode; 7. The camera according to claim 5 or 6, characterized in that when the operating element (14) is moved from the first relative position to the second relative position, the shutter release (10) outputs a fourth control command which activates a memory operating mode.

Images