JP2009188879A - Digital camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily change a photographing sensitivity in photography without changing the operation state from a photographing state to a setting state. <P>SOLUTION: The digital camera includes a sensitivity changing member capable of changing, by one operation, at least a photographing sensitivity in exposure conditions in photography. With respect to the photographing sensitivity, either of different first and second upper limit values is set as an upper limit value used for photography, and it is preferable to change the upper limit value of the photographing sensitivity between the first and second upper limit values by operating the sensitivity changing member. The change range of the photographing sensitivity to be used for photography includes different first and second change ranges, and it is preferable to select the change range of the photographing sensitivity between the first and second change ranges by operating the sensitivity changing member. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a digital camera capable of changing photographing sensitivity at the time of photographing.

In the digital camera, the user can set the shooting sensitivity at the time of shooting. In recent digital cameras, in order to prevent camera shake during shooting, a camera that automatically controls shooting sensitivity during shooting and changes the exposure time and aperture value during shooting is provided. Note that the change in exposure time at the time of photographing includes, for example, a change in shutter speed and a change in charge accumulation time in the image sensor.
Japanese Patent Laying-Open No. 2005-341074 JP 2007-295281 A

  By the way, in the above-described digital camera, it is possible to set the shooting sensitivity at the time of shooting, for example, by switching the operation state of the digital camera from the shooting state to the setting state at the time of non-shooting. In order to newly set the shooting sensitivity during shooting in this way, multiple operations are performed before setting the shooting sensitivity, such as setting the shooting sensitivity during shooting after switching the operating state of the digital camera to the setting state. Since there is a need, when the shooting timing intended by the user is reached during the setting operation, the shooting timing is missed.

  The present invention has been invented in order to solve the above-described problems, and provides an imaging apparatus that can easily change the shooting sensitivity at the time of shooting without switching the operation state from the shooting state to the setting state. The purpose is to provide.

  According to a first aspect of the present invention, there is provided a digital camera including a sensitivity changing member capable of changing at least the photographing sensitivity by one operation among the exposure conditions at the time of photographing.

  In a second aspect based on the first aspect, the photographing sensitivity is set such that one of a first upper limit and a second upper limit having different values is set in advance as an upper limit used at the time of photographing. By operating a member, the upper limit of the photographing sensitivity is changed between the first upper limit and the second upper limit.

  According to a third aspect, in the first or second aspect, the photographing sensitivity is set in advance as a variation range used at the time of photographing, one of a first variation range and a second variation range that are different ranges. In addition, by operating the sensitivity changing member, the variation range of the photographing sensitivity is changed between the first variation range and the second variation range.

  According to a fourth invention, in any one of the first to third inventions, the sensitivity changing member includes an operation member to which a function executed at the time of operation can be assigned in advance.

  In a fifth aspect based on any one of the first to third aspects, the sensitivity changing member includes a speed changing member that is operated when changing a shutter speed at the time of photographing. The photographing sensitivity is changed in synchronization with the change in the shutter speed.

  According to the present invention, even if the operation state of the digital camera is not changed at the time of shooting, the shooting sensitivity can be easily changed by simply operating the sensitivity changing operation member, and shooting can be performed by instantaneously switching the shooting sensitivity. In addition, when shooting a subject whose movement changes, the shooting sensitivity can be changed by changing the shutter speed. Therefore, shooting can be performed in accordance with the movement of the subject without missing the shooting timing.

  FIG. 1 is a functional block diagram illustrating an example of a digital camera 10. As is well known, the digital camera 10 photoelectrically converts the subject light transmitted through the imaging optical system 15 by the imaging element 16 and acquires image data from the electrical signal after the photoelectric conversion.

  The imaging optical system 15 includes a photographing lens 20 and a lens group 21 including a zoom lens and a focus lens. The zoom lens included in the lens group 21 moves along the optical axis L so as to achieve the selected imaging magnification. Further, the focus lens slightly moves along the optical axis L when adjusting the focus of the subject image. The lens group 21 is driven and controlled by a lens driving mechanism 22.

  The aperture 23 has an aperture (not shown) through which subject light passes, and adjusts the amount of subject light incident on the image sensor by changing the size of the aperture. The diaphragm 23 is driven and controlled by a diaphragm driving circuit 24 to change the size of the above-described opening.

  The shutter 25 forms an image of the subject light on the light receiving surface of the image sensor when the optical path of the subject light is opened. The shutter 25 is driven and controlled by a shutter drive circuit 26. By controlling the time for opening the optical path of the subject light by the shutter 25 (opening time = shutter speed), the amount of light received by the image sensor is controlled. In the present embodiment, a mechanical shutter is used. However, the present invention is not limited to this, and a so-called electronic shutter that controls the charge accumulation time of the image sensor 16 can also be used.

  For example, a CCD (Charge Coupled Device) or a CMOS (Complementary Metal-Oxide Semiconductor) is used as the imaging device 16 to receive the subject light irradiated when the shutter 25 is opened, and to accumulate signal charges according to the received light amount. To do. The image sensor 16 is driven and controlled by a driver 27. Specifically, for example, when the opening of the shutter 25 is finished, the image sensor 16 is driven and controlled so as to output the accumulated signal charge to an AFE (Analog Front End) circuit 30. In the following description, the signal charge accumulated by the image sensor 16 is referred to as an analog image signal.

  The AFE circuit 30 includes an AGC circuit and a CDS circuit (not shown). The AFE circuit 30 performs analog processing such as gain control and noise removal on the input analog image signal.

  A DFE (Digital Front End) circuit 31 converts an analog image signal subjected to analog processing by the AFE circuit 30 into a digital image signal. The converted digital image signals are collected frame by frame and stored in the buffer memory 32 as digital image data. The driver 27, the AFE circuit 30, and the DFE circuit 31 are controlled based on the operation timing in the timing generator (TG) 33, respectively. Reference numeral 34 denotes a bus, and each part of the digital camera 10 is electrically connected via the bus 34.

  The image processing unit 35 performs image processing such as contour compensation, gamma correction, and white balance adjustment on the digital image data stored in the buffer memory 32. In addition, noise reduction (NR) processing (hereinafter referred to as high sensitivity NR processing) for high sensitivity noise is also performed during image processing. High-sensitivity noise is a process for reducing noise generated in an image shot with high shooting sensitivity. The digital image data subjected to the image processing is subjected to format processing (image post-processing) for compression by a storage method such as the JPEG method, and then stored in the buffer memory 32 again. The digital image data stored in the buffer memory 32 is compressed using a compression rate corresponding to a predetermined compression method.

  For example, when a through image is displayed on the LCD 36 provided in the digital camera 10, compression processing is executed on the digital image data after the image processing using a compression rate that matches the resolution of the LCD 36, and the display control unit To 37.

  On the other hand, when storing digital image data, a compression process using a compression rate suitable for image storage is performed and stored in the built-in memory 38. The digital image data stored in the built-in memory 38 is written into a storage medium 40 such as a memory card or an optical disk via the media controller 39. As the compression rate for image storage, in addition to the compression rate that matches the image storage resolution set in advance in the digital camera 10, the compression rate that matches the resolution set by the user operating the operation unit 46 in advance. Compression rate.

  The photometric sensor 42 operates when the release button 47 is operated, and detects the brightness of the subject (subject brightness).

  The strobe device 43 emits strobe light toward the subject when the subject brightness detected by the photometric sensor 42 is a predetermined value or less. The strobe device 43 is controlled by a strobe control unit 44.

  The operation unit 46 is operated, for example, when selecting a mode during imaging or changing settings during imaging. Note that the setting at the time of imaging includes the setting of the above-described photographing sensitivity, the setting of the presence / absence of the above-described high luminance NR processing, and the like. Note that the setting of the shooting sensitivity includes, for example, settings such as a shooting sensitivity fluctuation range and an upper limit of shooting sensitivity during auto shooting. In addition, the setting of high luminance NR processing includes setting of presence / absence of high luminance NR processing, setting of photographing sensitivity in which high sensitivity NR processing is executed when high sensitivity NR processing is performed, and setting of high luminance NR processing itself. Setting (for example, strength) is exemplified. When the operation unit 46 is operated, operation signals from the operation unit 46 are sequentially output to the CPU 50.

  The release button 47 is a button operated when shooting. When the release button 47 is operated, photometry processing for subject luminance, AE processing, AF processing, and the like are executed, and then imaging processing is executed.

  The function button 48 is a button to which the function is assigned so that one of the functions provided in the digital camera 10 can be executed by one operation. In this embodiment, the function button 48 is assigned a function for switching the photographing sensitivity, and the setting of the photographing sensitivity is changed between, for example, setting 1 and setting 2 by the operation (for example, pressing operation). The operation of the function button 48 is such that, for example, the shooting sensitivity setting is changed when the function button 48 is pressed, and the shooting sensitivity setting is changed only when the function button 48 is pressed. May be. In addition, although there are two types of setting of the shooting sensitivity, setting 1 and setting 2, it is not necessary to limit to this, and there may be three or more types of setting of shooting sensitivity.

  The CPU 50 comprehensively controls each unit of the digital camera 10. The CPU 50 has functions of an AE processing unit 51 and an AF processing unit 52 by executing a control program (not shown).

  The AE processing unit 51 obtains an exposure amount at the time of imaging from the output signal of the photometric sensor 45, and then determines exposure conditions at the time of imaging such as an aperture value, a shutter speed, and a control sensitivity value of the image sensor. First, the shutter speed when the aperture value becomes maximum is obtained, and the shutter speed is compared with a preset lower limit of the shutter speed. If the calculated shutter speed is slower than the lower limit of the shutter speed, the aperture value is lowered and the shutter speed is calculated again. If the shutter speed obtained even when the aperture value is lowered to the minimum value becomes slower than the lower limit value of the shutter speed, the photographing sensitivity is increased, and the aperture value and the shutter speed are calculated again by the method described above. Note that the lower limit of the shutter speed is set in advance according to the value of the photographing sensitivity.

  The AF processing unit 52 calculates a physical quantity necessary for AF control from the input image signal. For example, a focus evaluation value indicating the sharpness of the image is calculated from the input image signal. The movement of the focus lens is controlled via the lens driving mechanism 22 so that the calculated focus evaluation value is maximized.

  Next, the flow at the time of photographing will be described based on the flowchart shown in FIG. Hereinafter, a case where a plurality of upper limits of photographing sensitivity are set in advance (hereinafter, photographing sensitivity settings are set to 1 and 2) will be described.

  Step S101 is processing for determining whether or not the function button 48 has been operated. If it is determined in the process in step S101 that the function button 48 has been operated (the process in step S101 is Yes), the process proceeds to step S102. On the other hand, if it is determined that the function button 48 has not been operated (the process of step S101 is Yes), the process proceeds to step S105.

  Step S102 is a process executed when it is determined in the determination in step S101 that the function button 48 has been operated. The processing in step S102 is processing for determining whether or not the setting of the photographing sensitivity in the digital camera 10 is setting 1. If the shooting sensitivity setting is setting 1 (when the determination in step S102 is Yes), the process proceeds to step S103. On the other hand, if the shooting sensitivity setting is not setting 1 (when the determination in step S102 is No), the process proceeds to step S104.

  Step S103 is a process performed when the setting of the shooting sensitivity is set to 1 in the determination in step S102. Specifically, the process is a process of changing the setting of the shooting sensitivity from setting 1 to setting 2.

  Step S104 is a process performed when the determination in step S102 indicates that the setting of the photographing sensitivity is not setting 1. Since there are only two shooting sensitivity settings, setting 1 and setting 2, if the shooting sensitivity setting is not setting 1 in the determination in step S102, the shooting sensitivity field setting is setting 2. In S104, the setting of the photographing sensitivity is changed from setting 2 to setting 1.

  Step S105 is processing to determine whether or not the release button 47 has been operated. If it is determined in this determination that the release button 47 has been operated (the processing in step S105 is Yes), the process proceeds to step S106. On the other hand, if it is determined that the release button 47 has not been operated (No in step S105), the camera enters a standby state without performing the shooting process.

  Step S106 is a pre-shooting process. In this pre-shooting process, after the subject brightness is measured by the photometric sensor 45, an AE process using the measured subject brightness is executed. In this AE process, the set shooting sensitivity is used, and the aperture value, shutter speed, and shooting sensitivity are determined. After these AE processes are executed, the AF process is executed to determine the position of the focus lens.

  Step S107 is an imaging process using the aperture value, shutter speed, and shooting sensitivity determined in the AE process in step S106.

  Thereby, since the setting of the shooting sensitivity in the digital camera 10 can be changed only by operating the function button 48, the operation required when changing the shooting sensitivity can be minimized, and the shooting timing intended by the user can be reduced. It is possible to perform shooting without missing.

  In the following, a specific embodiment for setting the photographing sensitivity that is changed by operating the function button 48 will be described. In addition, about the Example shown below, the digital camera which can image | photograph using either ISO100-ISO6400 imaging sensitivity is demonstrated. Further, the shooting sensitivity when setting 1 is referred to as S1, and the shooting sensitivity when setting 2 is referred to as S2.

[Example 1]
In the first embodiment, a case where the upper limit of the photographing sensitivity is changed by operating the function button 48 will be described. As shown in FIG. 3, the upper limit of the shooting sensitivity S1 in setting 1 is ISO400, and the upper limit of the shooting sensitivity S2 in setting 2 is ISO6400, which is the maximum shooting sensitivity. That is, when the shooting sensitivity setting is set 1, the variation range of the shooting sensitivity S1 is ISO100 ≦ S1 ≦ ISO400, and when the shooting sensitivity is setting 2, the variation range of the shooting sensitivity S2 is ISO100 ≦ S2 ≦ ISO6400. It becomes. Note that the upper limit of the shooting sensitivity S2 in the setting 2 is not necessarily limited to the maximum shooting sensitivity ISO6400, and may not be the same as the upper limit of the shooting sensitivity S1 in the setting 1.

  As described above, the upper limit of the shooting sensitivity S1 in setting 1 is ISO400, and the upper limit of the shooting sensitivity S2 in setting 2 is ISO6400. Therefore, the setting of the shooting sensitivity is set from setting 1 by operating the function button 48. When changed to 2, the upper limit of the photographing sensitivity is raised to ISO6400. As described above, the upper limit of the shooting sensitivity can be increased, so that the shutter speed at the time of shooting can be increased. Therefore, the image quality is reduced, but this is suitable for acquiring an image in which the influence of camera shake is suppressed.

  On the other hand, when the shooting sensitivity setting is changed from setting 2 to setting 1, the upper limit of shooting sensitivity is lowered to ISO400. By lowering the shooting sensitivity, shooting with a shutter speed below the specified speed, that is, shooting under long exposure time conditions, it is impossible to suppress the effects of camera shake, but it has prevented deterioration in image quality. Suitable for acquiring images.

  In this case, only the upper limit of the shooting sensitivity is changed, and the lower limit of the shooting sensitivity is not changed. Therefore, when shooting without giving priority to the shutter speed, it is only necessary to set to 2 in advance. Since the lower limit of the shutter speed is set in advance according to the upper limit of the shooting sensitivity of each setting, in the AE process, the shutter speed at the time of shooting should not be lower than the lower limit of the shutter speed at the setting at the time of shooting. In addition, the shutter speed, aperture value, and shooting sensitivity are determined. Thus, by changing the setting of the shooting sensitivity, it is possible to easily select shooting under the exposure condition intended by the user.

  Further, there are cases where appropriate exposure conditions cannot be obtained simply by changing the setting of the photographing sensitivity by operating the function button 48. As shown in FIG. 4, when the upper limit of the shooting sensitivity S1 in setting 1 is ISO 400 and the upper limit of the shooting sensitivity S2 in setting 2 is ISO 800, depending on the shooting environment, the shooting sensitivity of each setting may be raised to the upper limit. When proper exposure conditions cannot be obtained, the shutter speed and aperture value are set so that appropriate exposure conditions can be obtained after raising the upper limit of the shooting sensitivity to ISO 3200, for example, without using setting 1 and setting 2. It is also possible to determine the photographing sensitivity.

[Example 2]
In the second embodiment, a case where the range of change in photographing sensitivity is changed by operating the function button 48 will be described. As shown in FIG. 5, the variation range of the photographing sensitivity S1 in the setting 1 is ISO100 ≦ S1 ≦ ISO400, and the variation range of the photographing sensitivity S2 in the setting 2 is ISO400 <S2 ≦ ISO6400.

  When the shooting button setting is changed from setting 1 to setting 2 by operating the function button 48, the fluctuation range of the shooting sensitivity S2 is changed to ISO400 <S2 ≦ ISO6400. In the case of setting 2, since shooting is performed using a fluctuation range in which shooting sensitivity is high, the shutter speed during shooting is increased. When shooting is performed using this setting 2, the image quality is reduced, but this is suitable for acquiring an image in which the influence of camera shake is suppressed.

  On the other hand, when the setting 2 is changed to the setting 1, the fluctuation range of the photographing sensitivity is changed to ISO100 ≦ S1 ≦ ISO400. In the case of setting 1, since the shooting is performed using the fluctuation range where the shooting sensitivity is low, the shutter speed at the time of shooting becomes slow. When shooting is performed using this setting 1, the influence due to camera shake cannot be suppressed, but it is suitable for acquiring an image in which the deterioration of image quality is suppressed. In this case, since the lower limit of the variation range in each setting is set in advance, when shooting with a slow shutter speed, such as night shooting, the shooting sensitivity setting is set to 1 and the environment is bright. For example, when shooting with a high shutter speed, the setting of the shooting sensitivity may be set to 2. Thus, by changing the setting of the shooting sensitivity, it is possible to easily select shooting under the exposure condition intended by the user. Note that when changing the variation range of the imaging sensitivity, the lower limit of the variation range of the imaging sensitivity S2 in the setting 2 can be set to be equal to or lower than the upper limit of the imaging sensitivity S1 in the setting 1. In this case as well, if the appropriate exposure condition cannot be obtained simply by changing the shooting sensitivity setting by operating the function button 48, the appropriate exposure condition can be set without using the shooting sensitivity of the setting 1 and setting 2. It is also possible to increase the shooting sensitivity so that

[Example 3]
In the third embodiment, a case where the presence / absence of high-sensitivity NR processing is changed in accordance with the change of the photographing sensitivity fluctuation range by the operation of the function button 48 will be described.

  As described above, depending on the digital camera, it is possible to execute high-sensitivity NR processing in shooting with a shooting sensitivity higher than the set shooting sensitivity by setting shooting sensitivity for executing high-sensitivity NR processing. Become. As shown in FIG. 6, for example, the variation range of the photographing sensitivity S1 in setting 1 is ISO100 ≦ S1 ≦ ISO400, and the variation range of the photographing sensitivity S1 in setting 2 is ISO400 <S2 ≦ ISO6400, and the photographing sensitivity at the time of photographing exceeds ISO400. A case where the high sensitivity NR process is executed when the shooting sensitivity is S (when S is ISO, when S> ISO400) will be described.

  For example, when the setting of the shooting sensitivity is set to 2, since the variation range of the shooting sensitivity S2 in the setting 2 is ISO400 <S2 ≦ ISO6400, a high sensitivity NR is obtained for an image obtained in shooting using the setting 2. Processing is executed. This high-sensitivity NR processing is performed in accordance with image processing such as contour compensation, gamma correction, and white balance adjustment in the image processing unit 35 described above, so that it takes time for image processing for one image, and the next photographing can be performed. Therefore, the number of captured images per unit time for continuous shooting is reduced.

  On the other hand, when the setting of the shooting sensitivity is setting 1, the fluctuation range of the shooting sensitivity S1 in setting 1 is ISO100 ≦ S1 ≦ ISO400. Therefore, for an image obtained by shooting using setting 1, it is high. Sensitivity NR processing is not performed. In the case of shooting using setting 1, since high-sensitivity NR processing is not executed, the image processing time required for image processing in the image processing unit 35 is shortened. For example, per unit time for continuous shooting The number of captured images increases. According to this, it is possible to change whether or not to execute the high sensitivity NR process when changing the setting of the photographing sensitivity.

  In a conventional digital camera, when the setting is made to execute high-sensitivity NR processing, high-sensitivity NR processing is executed for an image shot with shooting sensitivity for which high-sensitivity NR processing is executed. Then, for an image shot at a shooting sensitivity at which high-sensitivity NR processing is not executed, the next processing is delayed by the time when high-sensitivity NR processing is executed. By changing, it is also possible to change whether or not to execute the high sensitivity NR process. Therefore, in the shooting using the setting 1 which is a setting not to execute the high sensitivity NR process, the high sensitivity NR process described above is performed. There is no need to delay the next processing for the time to be executed.

[Example 4]
In the fourth embodiment, the case where the strength of the high sensitivity NR process to be executed is changed in accordance with the change in the photographing sensitivity fluctuation range by the operation of the function button 48 will be described. In a digital camera, in addition to setting the shooting sensitivity for executing the high sensitivity NR process described above, the strength of the high sensitivity NR process may be set. As shown in FIG. 7, the variation range of the imaging sensitivity S1 in the setting 1 is ISO100 ≦ S1 ≦ ISO800, and the variation range of the imaging sensitivity S2 in the setting 2 is ISO800 <S2 ≦ ISO6400. In addition, high sensitivity NR processing is executed for shooting with shooting sensitivity S exceeding ISO400, shooting sensitivity S is weakened for high sensitivity NR processing for shooting with ISO400 <S ≦ ISO800, and shooting sensitivity S is ISO800 <S. ≤High sensitivity NR processing for ISO 6400 imaging.

  For example, in shooting using setting 1, high sensitivity NR processing is not performed on an image obtained by shooting within the range of S1 ≦ ISO400, but the shooting sensitivity is in the range of ISO400 <S ≦ ISO800. In the above shooting, high sensitivity NR processing is executed with a weak setting for the obtained image. On the other hand, in shooting using setting 2, the fluctuation range in shooting sensitivity S2 is ISO800 <S ≦ ISO6400. Therefore, in shooting using setting 2, high sensitivity NR processing is strong for the obtained image. It is executed with the setting. Thereby, the setting of the high sensitivity NR process is also changed in accordance with the change of the photographing sensitivity.

  In this embodiment, a function for changing the shooting sensitivity is assigned to the function button 48, and the shooting sensitivity is changed by operating the function button 48. However, the present invention is not limited to this, and the shooting sensitivity is newly changed. It is also possible to provide an operation member operated for this purpose in the digital camera.

  In addition to this, for example, a shutter speed operation member operated when changing the shutter speed can be provided, and the setting of the photographing sensitivity can be changed in conjunction with the change of the shutter speed by the operation of the operation member. is there. As shown in FIG. 8, the setting of the shooting sensitivity when the shutter speed is 1/100 or less is set to 1, and the setting of the shooting sensitivity when the shutter speed exceeds 1/100 is set to 2. In accordance with the change, the setting of the photographing sensitivity is changed between setting 1 and setting 2. Note that the contents of changing the shooting sensitivity between setting 1 and setting 2 include changing the shooting sensitivity fluctuation range in addition to changing the upper limit of shooting sensitivity.

  In this case, not only the setting of the shooting sensitivity can be changed in accordance with the shutter speed, but also the setting for performing single shooting or continuous shooting can be switched. When the shutter speed is increased, the shooting sensitivity is increased. In such a case, the setting is changed so that continuous shooting is performed. On the other hand, when the shutter speed is lowered, the shooting sensitivity is lowered. In such a case, the setting is changed to single shooting.

  For example, if the pitcher is mounding, the pitcher's movement is small, so shooting is performed with a reduced shutter speed. When the pitcher enters the pitching motion, the pitcher's movement is large, Since the movement of each part becomes faster, continuous shooting is often performed at a setting with an increased shutter speed. In this way, in addition to changing the shutter speed, you can change the shooting sensitivity and whether to take single shots or continuous shots. Since the shooting mode can be changed, shooting can be performed without missing the shooting timing intended by the user.

It is a functional block which shows the structure of a digital camera. It is a flowchart which shows the flow of the process at the time of imaging | photography. It is explanatory drawing which shows the upper limit of the imaging sensitivity in the setting 1 and the setting 2 when changing the upper limit of an imaging sensitivity by operation of a function button, respectively. It is explanatory drawing which shows the upper limit of the setting sensitivity of setting 1 and setting 2 when automatically raising the upper limit of an imaging sensitivity when appropriate exposure cannot be performed in both the settings of the setting 1 and the setting 2, respectively. It is explanatory drawing which shows the fluctuation range of the imaging sensitivity in the setting 1 and the setting 2, respectively when changing the fluctuation range of the imaging sensitivity at the time of imaging by operating the function button. In addition to changing the shooting sensitivity fluctuation range at the time of shooting by the operation of the function button, the shooting sensitivity fluctuation range of setting 1 and setting 2 and high sensitivity when changing whether to execute high sensitivity NR processing or not. It is explanatory drawing which shows the imaging sensitivity in which NR processing is performed. It is explanatory drawing in the case of changing the strength of high-sensitivity NR processing in addition to changing the fluctuation range of shooting sensitivity during shooting by operating a function button. It is explanatory drawing which shows the correlation with the setting of a shutter speed and imaging sensitivity.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Digital camera, 16 ... Image sensor, 23 ... Aperture, 25 ... Shutter mechanism, 35 ... Image processing part, 45 ... Photometry sensor, 48 ... Function button, 50 ... CPU, 51 ... AE processing part, 52 ... AF processing part

Claims (5)

  A digital camera comprising a sensitivity changing member capable of changing at least the photographing sensitivity by one operation among exposure conditions at the time of photographing. The digital camera according to claim 1, wherein
As the upper limit used at the time of shooting, either one of the first upper limit and the second upper limit having different values is set in advance as the shooting sensitivity.
The digital camera according to claim 1, wherein the upper limit of the photographing sensitivity is changed between the first upper limit and the second upper limit by operating the sensitivity changing member. The digital camera according to claim 1 or 2,
The photographing sensitivity is set in advance as a variation range used at the time of photographing, one of a first variation range and a second variation range consisting of different ranges,
The digital camera according to claim 1, wherein the imaging sensitivity fluctuation range is changed between the first fluctuation range and the second fluctuation range by operating the sensitivity changing member. The digital camera according to any one of claims 1 to 3,
The digital camera according to claim 1, wherein the sensitivity changing member includes an operation member to which a function executed at the time of operation can be assigned in advance. The digital camera according to any one of claims 1 to 3,
The sensitivity changing member is a shutter speed changing member that is operated when changing the shutter speed at the time of shooting.
The digital camera is characterized in that the setting of the photographing sensitivity is changed in accordance with the change of the shutter speed by the operation of the shutter speed changing member.

Images