JP4323925B2 - Optical equipment - Google Patents

Description

  The present invention relates to an imaging apparatus such as a video camera and a digital still camera, and an optical apparatus such as a lens apparatus.

  Conventionally, image pickup apparatuses disclosed in Patent Documents 1 and 2 have been disclosed as a configuration in which an image formed by a photographing optical system is picked up by an image pickup device and a peripheral light amount drop of a screen in the image data is corrected.

  However, in the imaging devices disclosed in Patent Documents 1 and 2 above, a configuration is proposed in which the peripheral light amount drop on the screen is corrected by electrically performing image processing on the captured image information in a subsequent process. However, the problem that the image quality deteriorates remains.

Various examples of so-called rear focus systems have been proposed as photographing optical systems in which focusing is performed by moving a variable power lens and a lens group behind the variable power lens. This is because the rear focus system moves a relatively small and lightweight lens group, so the driving force of the lens group is small, and quick focusing can be performed, making it compatible with the autofocus system. Because there is. As such an optical system, there are configurations disclosed in Patent Documents 3 and 4. In Patent Documents 3 and 4, four lenses of a first group having a positive refractive power, a second group having a negative refractive power, a third group having a positive refractive power, and a fourth group having a positive refractive power are sequentially arranged from the object side. There is disclosed a rear focus zoom lens having a lens group, performing zooming by moving the second lens group, correcting image plane fluctuations accompanying zooming by moving the fourth lens group, and performing focusing.
JP 2000-195953 A JP 2001-275029 A JP-A-62-24213 JP-A-4-43311

  By the way, in recent years and in the future, with higher image quality and higher magnification of the photographing optical system, higher performance of various functions is increasingly required in order to widen the photographing range.

  In particular, there is a strong demand for bright lenses in photographing optical systems. However, when only the photographing optical system is brightened in the conventional specification, a number of problems arise.

  One of them is a problem of increasing the size of the lens. In order to improve this, there is a method to reduce the amount of peripheral light, which is one of the major factors that determine the size of the lens, compared to the conventional method. However, if the brightness of the subject is uniform, The phenomenon that the part becomes dark occurs.

  An object of the present invention is to provide an optical apparatus that can obtain image information close to the brightness distribution of a subject with less influence of a change in the amount of light by a lens on a screen.

In order to achieve the above object, an optical apparatus according to claim 1 includes a photographing optical system, a light amount adjusting unit that adjusts a light amount of the photographing optical system, and an imaging unit that captures an image formed by the photographing optical system. A light quantity information storage means for storing information on a peripheral light quantity change in the photographing optical system corresponding to at least a light quantity adjustment value by the light quantity adjustment means, and a detection means for detecting image brightness information from the output of the imaging means The light amount adjusting means according to the information on the peripheral light amount change stored in the light amount information storing means corresponding to the current light amount adjustment value of the light amount adjusting means and the image brightness information from the detecting means. And a control means for controlling the light quantity adjustment value .
The optical apparatus according to claim 2 is a photographing optical system, a light amount adjusting means for adjusting a light amount of the photographing optical system, an imaging means for picking up an image formed by the photographing optical system, and at least the light amount adjusting means. A light amount information storage means for storing information relating to a change in peripheral light amount in the photographing optical system corresponding to the light amount adjustment value by the detection means, a detection means for detecting image brightness information from the output of the imaging means, and a current light amount adjustment means The sensitivity of each pixel of the imaging unit is controlled according to the information on the peripheral light amount change stored in the light amount information storage unit corresponding to the light amount adjustment value and the brightness information of the image from the detection unit. And a control means.

  Here, the optical apparatus of the present invention includes a lens exchange type camera system in which a lens body is detachably attached to a camera body, and a camera in which the lens and the camera body are integrated. The interchangeable lens device has the light quantity information storage means.

  According to the present invention, it is possible to obtain image information in which the influence of the peripheral light amount change by the lens on the screen is reduced.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing the configuration of an optical apparatus that is Embodiment 1 of the present invention. In FIG. 1, A indicates a lens unit, and B indicates a camera unit in which the lens unit A is detachably mounted by a mount mechanism (not shown). In the present invention, the optical apparatus includes a lens exchange type camera system in which a lens is detachably attached to the camera body, and a camera in which the lens and the camera body are integrated.

  In FIG. 1, A indicates a lens unit. Reference numeral 1 denotes an optical system, which includes a four-group rear focus zoom lens (hereinafter referred to as an RFZ lens) including four lens groups. That is, the RFZ lens 1 includes a first lens group (hereinafter referred to as a front lens) 101 which is a fixed lens group, a second lens group (hereinafter referred to as a variator) 102 which is a moving lens group and has a variable power function, and a fixed lens group. A third lens group (hereinafter referred to as afocal) 103 that is a lens group, a moving lens group that is a focus function, and a fourth function that serves as a compensator that corrects fluctuations in the position of the image plane due to the zooming operation. A lens group (hereinafter referred to as a focus lens) 104 is configured. A converter 1c is arbitrarily provided behind the zoom lens body (on the camera side), and the focal length of the zoom lens can be moved. Although the converter 1c is disposed rearward here, it may be configured to be detachably disposed in front of the zoom lens.

  Reference numeral 3 denotes a diaphragm device which is a light amount adjusting member, which adjusts the amount of light incident on the image sensor (photoelectric conversion element) 21 provided in the camera unit B. 4 is a diaphragm driving unit for changing the aperture (aperture amount) of the diaphragm device 3, 5 is a diaphragm position detecting unit for detecting the position of the diaphragm device 3, and 6 is a diaphragm based on an output signal of the diaphragm position detecting unit 5. It is a detection circuit that detects the aperture (aperture amount) of the device 3. Reference numeral 7 denotes a lens control unit that comprehensively controls each operation in the lens unit A. The lens control unit 7 is composed of a microcomputer and has a CPU, a ROM, and a RAM (not shown). Then, according to the control program stored in the ROM, the CPU uses the RAM as a work area and the like, and performs various controls such as the variator 102 for zoom processing, the movement control of the focus compensator 104, and the light amount adjustment control of the diaphragm 3. Control the behavior.

  Reference numerals 8 and 9 denote motors such as stepping motors and linear motors for moving the variator lens 102 and the focus competition lens 104, respectively. The motors 8 and 9 are driven by motor drivers 10 and 11, respectively. A zoom position sensor 12 detects the position (zoom position) of the variator 102, and outputs a zoom position detection signal to the lens control unit 7. A focus position sensor 13 detects the focus position (subject distance information) of the focus lens, and outputs a focus position signal (subject distance information) to the lens controller 7. In the configuration in which stepping motors are used as the motors 8 and 9, the initial position (reset position) of the stepping motor is detected by a reset sensor (not shown), and the motor drive signal (pulse signal) for movement is counted from each reset position. The zoom position and focus position may be detected from the count value.

  In FIG. 1, B indicates a camera unit. Reference numeral 21 denotes an image pickup device such as a CCD, 22 denotes an amplifier that amplifies the output signal of the image pickup device 21, and 23 denotes a process circuit that converts the amplified signal into a video signal such as an NTSC video signal.

  A camera control unit 24 controls each operation on the camera unit side. The camera control unit 24 is constituted by a microcomputer and has a CPU, a ROM, and a RAM (not shown). Reference numeral 25 denotes an AF signal generation unit provided in the camera control unit, which generates a signal (hereinafter referred to as AF signal) for performing automatic focusing (hereinafter referred to as AF) from the video signal output from the process circuit 23. To do. The AF signal generation unit 25 has a filter that extracts a low frequency component and a high frequency component from the video signal. As a focus state detection method (AF detection), a hill-climbing type has been proposed, but the basic principle is well known, for example, in Japanese Patent Laid-Open No. Sho 62-103616. First, the AF signal uses a low-frequency component in an image signal in which it is easy to find the in-focus direction at the time of large blur. Further, a high frequency component in the image signal is used in order to set a true in-focus position when the blur is reduced to some extent. In the present embodiment, the low-frequency component and the high-frequency component are amplified and mixed with arbitrary amplification factors, so that the true in-focus position can be found even in the case of large blurring or in the vicinity of the in-focus state. In other words, even if the frequency characteristics of the image signal change depending on the characteristics of the subject, the camera, and the lens, it is possible to cope sufficiently.

  Reference numeral 26 denotes an AE (exposure) signal generation unit provided in the camera control unit 24, which generates an AE signal (a signal of exposure control information based on screen brightness) based on a signal output from the amplifier 22. Reference numeral 27 denotes a memory such as a ROM or a RAM, in which control information (table data) relating to sensitivity (gain) for each pixel in the image sensor 2 is stored. This memory may be a memory in the control unit 24 or may be a separate memory. Sensitivity (gain) control information for each pixel stored in the memory 27 corresponds to each lens's sensitivity (amplifier amplification) in the two-dimensional plane of the image sensor 21 so as to substantially correspond to lens peripheral light amount change data described later. Rate) for each pixel, and control information of a plurality of sensitivities that substantially correspond to a plurality of optical system states is stored. The camera control unit 24 reads sensitivity information data corresponding to the light amount change data from the table data of the memory 27 based on the light amount change data transmitted from the lens control unit 7 described later, and sets the sensitivity of each pixel in the image sensor 21. Can be controlled. A zoom switch 28 is externally operated, and outputs a zoom signal indicating a zoom direction and a zoom amount in accordance with the operation of the zoom switch 28.

  30 is an electrical contact provided on the mount on the camera side, 31 is an electrical contact provided on the mount on the lens side, and when the lens A is attached to the camera B by the mount mechanism, the electrical contacts 30 and 31 are connected. The camera control unit 24 and the lens-side control unit 7 are electrically connected to perform various communications (transfer of zoom operation information, AF information, AE information, lens information, light amount change information, etc.).

  Reference numeral 14 denotes an AF control unit provided in the lens-side control unit 7, which receives the AF signal output from the AF signal generation unit 25 of the camera control unit 24 via the electrical contacts 30 and 31, and the AF An AF control unit that performs an AF operation according to a signal. Reference numeral 15 denotes an AE control unit that receives the signal from the AE signal generation unit 26 via the electrical contacts 30 and 31 and controls the aperture 3, and controls the aperture drive unit 4. Reference numeral 16 denotes a lens-side memory that stores information related to a change in peripheral light amount (peripheral light amount drop) in each optical state in the optical system 1. The memory 16 may be a storage unit in the lens control unit 7 and is controlled. A memory separate from the unit 7 may be used. In the memory 16, a plurality of combinations (each optical state) corresponding to each combination of information of each zoom position (focal length information), focus position (subject distance information), aperture value (F number: FNo) of the optical system 1 are stored. The peripheral light amount change data is stored as table data.

  FIG. 2 is a diagram showing the data (table data) of the peripheral light amount change described above. The peripheral light amount information L1, L2,... L (2n) includes three parameters: focal length information that is zoom position information, aperture value information of the aperture 3, and object (subject) distance information that is the focus position. It is information corresponding to the combination. The lens control unit 7 reads out peripheral light amount change data corresponding to the current state of the optical system (zoom position, focus position, aperture value) from the memory 16, and reads the read data via the contacts 30 and 31. Tell 24.

  Here, a description will be given of a peripheral light amount change (peripheral light amount drop) in the optical system.

  FIG. 3 is a conceptual diagram showing, on a screen on the image sensor, how to reduce the peripheral light amount of an image formed by the optical system (RFZ lens shown in FIG. 1).

  As shown in FIG. 3, the central portion that almost coincides with the lens optical axis (the position where the X-axis and Y-axis of the image sensor intersect) is brightest and moves away from the center (going to the periphery). Therefore, the amount of light decreases and it becomes darker. The four corners of area A (photographing effective range of photoelectric conversion elements) indicated by broken lines are considerably attenuated. If this reduction is severe, the peripheral portion of the captured image will appear dark and unnatural. The area B indicated by the solid line (the imaging range of the area smaller than the area A) is on the inner side of the area A, so that the amount of light fall is still small, so the peripheral part of the captured image is not so dark and becomes a natural image.

  Further, how the amount of light falls varies greatly depending on the aperture value (F number: FNo) of the optical system (RFZ lens in FIG. 1). Generally, when the FNo is bright, the fall is remarkable, and when the FNo is dark, it decreases.

  As a result, the peripheral light amount change data stored in the memory 16 described above stores light amount information on a straight line from the optical axis center to the peripheral part (a straight line from the optical axis center to the corner of the area A in FIG. 3). (The information on the amount of light with respect to all the pixels in the imaging area of the imaging device 21 is obtained by using the information of this one straight line in each direction of 360 ° from the center of the optical axis).

And in order to make the brightness of the captured image obtained through the optical system in which the peripheral light amount change occurs as described above in a natural state,
1) Change the area to be photographed (the imaging range of the imaging device is set to a range with little change in light amount).

  2) It is effective to limit the use range of the aperture value (for example, not using the open F value but darkening the FNo of the aperture value used as the range from the intermediate aperture value to the small aperture value). Note that in the case of an image in which the periphery of the subject itself becomes dark, the aperture value may be set arbitrarily (open to small aperture).

  3) The sensitivity of each pixel of the photoelectric conversion element (imaging element) is partially changed in accordance with the change in light amount.

  As described above, the output image can be a natural brightness image close to the brightness distribution of the subject.

  Here, the above-described optical apparatus is an interchangeable lens type imaging device, and the camera control unit 24 of the camera unit B includes a signal for aperture operation (AE signal generation) in the video signal generated by the process circuit 23. AE signal of the unit 26) and the like are transmitted to the lens control unit 7 of the lens unit A via the contacts 30 and 31. The lens control unit 7 performs AF control and aperture control based on each signal transmitted from the camera control unit 24, and changes in peripheral light quantity corresponding to the zoom position, focus position, and aperture position, which are the current state of the optical system. And the like (data read from the table data in the memory 16) and the like are transmitted to the camera control unit 24. The camera control unit 24 corrects the AE signal of the AE signal generation unit 26 (aperture value that causes a small change in the peripheral light amount) and generates a zoom signal (a state in which the change in the peripheral light amount is small) according to the peripheral light amount information. Zoom position signal), electronic zoom control (capturing a range where the amount of change in the amount of peripheral light on the screen is small, expanding and interpolating and outputting), and each of the image sensors 21 corresponding to the peripheral light amount change data from the memory 27. By setting the sensitivity of each pixel of the imaging device 21 based on the sensitivity information of the pixel, the imaging control corresponding to the change in the amount of peripheral light by the optical system is performed. In the case of the above-described interchangeable lens, storing the peripheral light amount change data in a rewritable memory means that the peripheral light amount drop correction control is performed by matching various types of interchangeable lens optical systems and cameras. The effect that it can be performed easily is brought about.

  Next, imaging control (communication and control operations of the lens control unit 7 and the camera control unit 24) of the optical apparatus (camera system) of the first embodiment will be described with reference to the flowchart shown in FIG.

  First, when the lens unit A is mounted on the camera unit B by the mount mechanism and the power of the camera body is turned on, initial communication between the lens control unit 7 and the camera control unit 24 is performed, and steps (S and In (1), the lens control unit 7 confirms whether or not it is attached to the camera by the initial communication. Next, in step 2, the lens control unit 7 confirms whether the converter is attached. In step 3, the zoom position (focal length information), the focus position (subject (object) distance information), and the aperture value, which are the current optical states in the optical system 1, are detected. In step 4, the lens control unit 7 converts the information from the table data stored in the memory 16 into the information according to the converter mounting information, the zoom position information of the optical system, the focus position information, and the aperture value information at that time. The corresponding peripheral light amount data is read, and the read peripheral light amount change data is transmitted to the camera control unit 24 via the contacts 30 and 31. Next, in step 5, the camera control unit 24 receives peripheral light amount data from the lens control unit 7. Then, in step 6, the camera control unit 24 captures the peripheral light amount information in the current image information imaged on the image sensor 21, and the peripheral light amount data received in step 5 and the actual light amount captured in step 6 are captured. The peripheral light amount information (current peripheral light amount information) is compared. As a result, if the two data are almost the same, the subject can be judged as an image with almost uniform brightness (an image with almost uniform brightness in the state where there is no drop in the amount of light in the periphery of the optical system). It is determined to perform aperture control (control in which the aperture value is in the range from the intermediate aperture value to the small aperture value) where the amount of light is not conspicuous. On the other hand, in the case of data in which the peripheral light amount in the actual peripheral light amount information (current peripheral light amount information) captured in step 6 is low (peripheral light amount is dark) with respect to the peripheral light amount data received in step 5, It can be determined that the image is dark in the periphery, or the image of the subject is bright in the center of the screen (originally dark in the periphery), and the aperture control of the photographing optical system can be arbitrarily selected from open to small aperture values.

  Then, the camera control unit 24 changes the aperture value in step 7 based on the result of the above determination, and in step 8, the actual peripheral light amount information (current peripheral light amount information) has a substantially uniform brightness value (lens It is confirmed whether or not the aperture value is such that the influence of the decrease in the amount of ambient light due to the above is not significant. If the value is appropriate, the control is terminated. In step 7, if the aperture value cannot be selected properly, the process proceeds to step 9, where the light receiving sensitivity information of the image sensor 21 corresponding to the peripheral light amount data received in step 5 is read from the memory 27, and this light receiving sensitivity data is read. Based on this, the light receiving sensitivity of each pixel of the image sensor 21 is changed. As a result, it is possible to acquire an image that makes the peripheral light amount drop caused by the lens of the image data obtained by the imaging element 21 inconspicuous. In step 8, it is confirmed whether the actual peripheral light amount information (current peripheral light amount information) has a substantially uniform brightness value, and if it is an appropriate brightness value, the control is terminated.

  In the above control operation, if an image with appropriate brightness cannot be obtained even if the aperture value is controlled in step 7, the process proceeds to step 9, and the sensitivity of each pixel of the image sensor 21 is based on the sensitivity data. However, step 7 is abolished, and the process proceeds directly from step 6 to step 9 where the light receiving sensitivity information of the image sensor 21 corresponding to the peripheral light amount data received in step 5 is read from the memory 27. Control may be performed to change the light receiving sensitivity of each pixel of the image sensor 21 based on the light receiving sensitivity data.

  Although not shown in the above flowchart, in Step 6, the peripheral light amount data received in Step 5 is compared with the actual peripheral light amount information captured in Step 6, and as a result, the two data are almost the same. In this case, as a control for making the peripheral light amount inconspicuous, it is possible to change the zoom position of the optical system 1 so that the change in the peripheral light amount becomes inconspicuous and acquire an image at this zoom position. Furthermore, the electronic zoom (as shown in FIG. 2) enlarges the image data in the area B that is smaller than the area A to the size of the area A with respect to the normal imaging area A of the image sensor 21. (Interpolation of data between pixels) is performed, and the size of the captured image of the image sensor 21 may be limited to acquire an image in a range where the peripheral light amount is not conspicuous.

  Next, Example 2 of the optical apparatus of the present invention will be described with reference to the drawings.

  FIG. 5 is a block diagram illustrating a schematic configuration of an imaging apparatus (optical apparatus) according to Embodiment 2 of the present invention. The imaging apparatus of the present embodiment is an optical device such as a video camera or a digital still camera having a configuration in which a lens optical system and an imaging unit (camera unit) are integrated, and the system control unit 51 controls each unit. It has become. In FIG. 5, the same components as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 5, the system control unit 51 reads out data related to a change (falling) in peripheral light amount from lens information stored in advance in the memory 16 and performs AE (exposure control). Further, as shown in FIG. 2 described above, the peripheral light amount change data has the aperture value corresponding to the focal length and the peripheral light amount data at the object distance (subject distance) as table data as a three-dimensional parameter.

  Next, the aperture control operation of the optical apparatus according to the second embodiment will be described with reference to the flowchart of FIG.

  First, in step (denoted as S in the figure) 61, it is confirmed that the camera body is turned on, and the system control unit 51 performs the following confirmation on the current state of the optical system 1. In step 62, it is confirmed whether the converter is mounted. In step 63, the zoom position (focal length information) of the optical system 1 is detected, and in step 64, the aperture value is detected (note that the focus position (subject distance information) is also detected. (Information on the change in peripheral light amount) can be obtained, but even if the focus position information is omitted, the information on the change in peripheral light amount is hardly affected. In step 65, based on the converter mounting information, the zoom position information of the optical system 1 and the aperture value information, the peripheral light amount data corresponding to these information is read from the table data of the memory 16. Next, in step 66, the actual peripheral light amount information of the current image formed on the image sensor 21 is detected, and the actual peripheral light amount information is compared with the peripheral light amount data read in step 65. As a result, if the two data are almost the same, the subject can be judged as an image with almost uniform brightness (an image with almost uniform brightness in the state where there is no drop in the amount of light in the periphery of the optical system). It is determined that the diaphragm control is performed so that the change in the amount of light is not noticeable. On the other hand, in the case where the peripheral light amount data obtained in step 66 is low (peripheral light amount is dark) with respect to the peripheral light amount data obtained in step 65, an image in which the periphery of the subject is dark, or It can be determined that the subject screen has a bright image at the center of the screen (originally a dark image), and the aperture control of the photographic optical system can be arbitrarily selected from a wide range to a small aperture value. Then, the system control unit 51 changes the aperture value in step 67 based on the result of the above determination, and in step 68, the actual peripheral light amount information (light amount information in the current image) is affected by the drop in the peripheral light amount of the lens. It is confirmed whether the brightness value is hardly received. Thereafter, at step 69, the control is terminated. Although illustration is omitted, if the aperture value cannot be properly selected in step 68, the zoom position is changed and the zoom position is moved until an image with appropriate brightness is obtained (the angle of view is changed). Alternatively, the electronic zoom may be used to limit the size of the captured image of the image sensor 21 and capture the image in a range where the drop in the amount of peripheral light is not noticeable. Further, similarly to the first embodiment, the light receiving sensitivity information of the image sensor 21 corresponding to the received peripheral light amount data is read from the memory 27, and the light receiving sensitivity of each pixel of the image sensor 21 is changed based on the light receiving sensitivity data. Then, it may be controlled to acquire an image having a brightness that is hardly affected by a decrease in the amount of peripheral light by the lens.

  In each of the above-described embodiments, the optical system can be applied to an imaging apparatus that does not have a variable power lens (zoom lens), for example, has a single focus lens.

  FIG. 7 shows a video still camera (optical apparatus) to which the above light quantity control system is applied as an example of the present invention.

  In FIG. 7, 70 is a video / still camera body, 71 is a photographing optical system, 72 is an image sensor such as a CCD that receives a subject image by the photographing optical system 71, and 73 is a record that records a subject image received by the image sensor 72. Means 74 is a finder for observing a subject image displayed on a display element (not shown). The display element is composed of a liquid crystal panel or the like, and a subject image formed on the image sensor 72 is displayed. Reference numeral 75 denotes a liquid crystal display panel having a function equivalent to that of the viewfinder.

  In this optical apparatus, it is possible to obtain a natural image with little drop in the peripheral light amount by performing each control corresponding to the change in the peripheral light amount described above.

1 is a block diagram showing a configuration of an optical apparatus that is Embodiment 1 of the present invention. The figure which shows the data (table data) of a peripheral light quantity change. The figure for demonstrating the peripheral light amount change of the image imaged by an optical system. 3 is a flowchart illustrating control of the optical apparatus according to the first embodiment. FIG. 4 is a block diagram illustrating a configuration of an imaging apparatus (optical apparatus) according to a second embodiment. 9 is a flowchart showing the operation of the optical apparatus in Embodiment 2. The figure which shows the optical instrument in an Example.

Explanation of symbols

1 Shooting optical system 3 Aperture (light quantity adjustment member)
7 Lens Control Unit 16 Memory 21 Image Sensor 24 Camera Control Unit 26 AE Signal Generation Unit 27 Memory 51 System Control Unit

Claims (3)

A photographing optical system; a light amount adjusting means for adjusting a light amount of the photographing optical system; an imaging means for picking up an image formed by the photographing optical system; and the photographing optical corresponding to a light amount adjustment value at least by the light amount adjusting means. A light amount information storage means for storing information relating to a peripheral light amount change in the system, a detection means for detecting image brightness information from the output of the imaging means, and the light amount information corresponding to a current light amount adjustment value of the light amount adjustment means Control means for controlling a light amount adjustment value of the light amount adjusting means in accordance with information on the peripheral light amount change stored in the storage means and brightness information of the image from the detecting means. Optical equipment. A photographing optical system; a light amount adjusting means for adjusting a light amount of the photographing optical system; an imaging means for picking up an image formed by the photographing optical system; and the photographing optical corresponding to a light amount adjustment value at least by the light amount adjusting means. A light amount information storage means for storing information relating to a peripheral light amount change in the system, a detection means for detecting image brightness information from the output of the imaging means, and the light amount information corresponding to a current light amount adjustment value of the light amount adjustment means And control means for controlling the sensitivity of each pixel of the imaging means in accordance with the information on the peripheral light amount change stored in the storage means and the brightness information of the image from the detection means. Optical equipment. Has sensitivity information storage means for storing sensitivity information for each pixel of said imaging means in accordance with the light amount information the peripheral light amount change information about stored in the storage means, the control means, the current of the light amount adjusting means depending on the brightness information of the image of the light amount information the peripheral light amount change information about stored in the storage means corresponding to the light amount adjustment value from said detecting means, of the pixels stored in the sensitivity information memory means 3. The optical apparatus according to claim 1, wherein sensitivity of each pixel of the imaging unit is controlled using sensitivity information.

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