Abstract: A method and a device, such as an imaging device, for image processing for automatic detection of focus area are disclosed herein. In accordance with an embodiment, the device for image processing is the imaging device that is configured to extract a plurality of object features of a plurality of objects in a field-of-view (FOV) of the imaging device. A plurality of confidence maps are generated based on the extracted plurality of object features. The imaging device is further configured to determine a focus area corresponding to the FOV, based on the generated plurality of confidence maps by use of a pre-determined rule.

Abstract: An interchangeable lens includes: a mount unit on which a camera body can be mounted; a driven member; a drive unit that drives the driven member; a storage unit that stores lens data related to driving of the driven member by the drive unit; and a transmitter that sends lens-side judgment data, based on which whether the lens data is properly stored in the storage unit can be judged at the camera body, to the camera body.

Abstract: A digital camera includes a rotary switch, a switching unit, and a switching unit. The switching unit switches between two states independently of a function other than functions assigned to the respective states of the rotary switch, the two states including a restricted state where rotation of the rotary switch is restricted with a clicking feel and a function of at least one of a shutter speed and an aperture as a function with discrete output values is related to the rotating operation of the rotary switch and a non-restricted state where rotation of the rotary switch is not restricted and a function of at least one of focusing, and a zoom magnification of a lens, and similar function as a function with continuous output values is related to the rotating operation of the rotary switch.

Abstract: Provided is an image processing apparatus that corrects differences in the tints of captured images caused by differences in the color characteristics of lenses used to shoot the images, as well as a control method for such an apparatus. The type of an interchangeable lens used to shoot an image is determined from a plurality of types of interchangeable lenses having different color characteristics. The influence of differences in the color characteristics of the interchangeable lenses on the tint of the image is then reduced by setting at least one of white balance coefficients used in white balance adjustment of the image and conversion characteristics of a color space conversion process applied to the image to correspond to the type of the interchangeable lens used to shoot the image.

Abstract: A method for performing highlight restoration on a digital image includes comparing the pixels in the image with a saturation level value to identify saturated pixels. A saturation map of saturated pixels is generated. Each selected saturated pixel is identified as a restorable pixel only if at least one color channel of the pixel is unsaturated. For each restorable pixel, a group of the closest unsaturated pixels above, below, to the left, and to the right of the select saturated pixel is identified. A replacement pixel value is generated for each saturated color channel of the restorable pixel, using a combination of the pixel values of the unsaturated color channels of the restorable pixel and the pixel values of the corresponding color channels of the nearby unsaturated pixels.

Abstract: An interchangeable lens that can be fitted to and removed from a camera body, includes: an optical characteristic storage unit that stores information relating to optical characteristics of the interchangeable lens, including at least information related to vignetting of the interchangeable lens; and an optical characteristic transmission unit that transmits to the camera body the information relating to optical characteristics stored in the optical characteristic storage unit. And with an image height corresponding to one sixth of an image height from a center of an approximately rectangular photographic field to any of four corners of the photographic field being termed Y1, the optical characteristic storage unit stores, as the information related to vignetting of the interchangeable lens, information specifying vignetting at positions for which image heights from the center are integral multiples of Y1 from 2 through 6 inclusive.

Abstract: An image capturing apparatus comprises: a lens unit capable of changing a focal length; an imaging unit that outputs an image signal according to light incident through the lens unit; a filter capable of moving in a direction of insertion to an optical path of the imaging unit and in a direction of retraction from the optical path; and a control unit that controls a position of the filter using information related to the focal length of the lens unit.

Abstract: An electronic device includes a flash unit, an image sensor and a computing unit. The image sensor captures at least one first image and a second image, and captures a third image with the flash unit. The computing unit mixes the first images and the second image to form a mixed image. Besides, the computing unit integrates the mixed image and the third image to form an integrated image.

Abstract: An optical device includes an optical system, a diaphragm unit, a diaphragm unit, a focus-lens driving unit, a diaphragm driving unit, and a diaphragm control unit. The diaphragm control unit controls the diaphragm driving unit in accordance with the position to which the focus lens group has been moved by the focus-lens driving unit, thereby controlling the aperture opening of the diaphragm unit and ultimately limit a light beam passing through the camera system.

Abstract: An optical device includes an optical system, a diaphragm unit, a diaphragm unit, a focus-lens driving unit, a diaphragm driving unit, and a diaphragm control unit. The diaphragm control unit controls the diaphragm driving unit in accordance with the position to which the focus lens group has been moved by the focus-lens driving unit, thereby controlling the aperture opening of the diaphragm unit and ultimately limit a light beam passing through the camera system.

Abstract: A lens barrel assembly has a first groove formed in a stationary barrel. A second groove is formed in a rotatable barrel. A diaphragm control plate portion is disposed between an inner surface of the rotatable barrel and an iris diaphragm device in a rotatable manner in a circumferential direction, has an end portion connected to a driving ring. An engaging groove is formed in the diaphragm control plate portion to extend along the optical axis. An operable aperture ring is disposed outside the stationary barrel. A pin device has first and second end portions, the first end portion being secured fixedly to the aperture ring, the second end portion being inserted through the first and second grooves and the engaging groove, for operating upon rotation of the aperture ring to cause the engaging groove to rotate the diaphragm control plate portion to actuate the driving ring.

Abstract: A method and apparatus of depth of field rendering which simulates larger apertures for images captured at a smaller aperture. The depth of field rendering provides selective simulation of out-of-focus effects which are attainable with cameras having a larger aperture when capturing images at a smaller aperture. A blur function model is created based on the relationship between the blur change and the aperture change. This model is used to determine the blur difference which would arise between two images taken at two different apertures. Then the out-of-focus effect is generated by blurring the image in a rendering process based on the blur difference.

Abstract: A toll violation enforcement system that contains a capture unit that receives a trigger signal and takes vehicle images of passing vehicles. A lighting unit configured to operate continuously is provided to establish a major lighting source incident on the vehicle. A processing unit is provided that processes the vehicle image and controls the settings employed by the capture unit. The processing unit preferably contains a plate location module for extracting an original resolution license plate area image from a first vehicle image; an exposure control module for controlling the exposure setting on the capture unit to provide consistent intensity of the license plate area; a resolution reset module for changing the image resolution for a second vehicle image; an image enhancement module for brightening pixels of the second vehicle image; and an image compression module for compressing the license plate area image and second vehicle image to a predetermined format.

Abstract: An image capturing apparatus comprises: a lens unit capable of changing a focal length; an imaging unit that outputs an image signal according to light incident through the lens unit; a filter capable of moving in a direction of insertion to an optical path of the imaging unit and in a direction of retraction from the optical path; and a control unit that controls a position of the filter using information related to the focal length of the lens unit.

Abstract: An image is obtained using a photographing unit including an optical system provided with an aperture and focus adjusting mechanism. Two or more types of subjects are detected from the image. When the two or more types of subjects are detected from the image, one priority subject is determined among the two or more types of subjects. The aperture and the optical system are adjusted so that the priority subject is focused and the subject other than the priority subject is within a depth of field of the photographing unit.

Abstract: A zoom lens includes a zoom optical system including movable lens groups for zooming which are moved between a ready-to-photograph position and an accommodated position, a diaphragm mechanism, and a lens shutter. One of the movable lens groups serves as an aperture-control lens group. The diaphragm mechanism and the lens shutter are positioned in front of and behind the aperture-control lens group and are movable relative to the aperture-control lens group in the optical axis direction. The diaphragm and the lens shutter are moved to close positions to the aperture-control lens group when the movable lens groups are moved to the accommodated position. Both apertures of the diaphragm mechanism and of the lens shutter are widely opened to allow the aperture-control lens group to partly enter the apertures when the diaphragm mechanism and the lens shutter are moved to the close positions.

Abstract: Disclosed herein is an imaging device that includes a photographing lens configured to focus light from a subject, a splitter configured to split the focused light to left and right in an area, in which light diffused from one point of the subject becomes parallel light, so as to respectively form different polarized lights, an imaging lens configured to respectively image the split different polarized lights, a transmission unit configured to receive the imaged different polarized lights on the same plane so as to transmit any one of the polarized lights in each area of the plane, an imaging element configured to convert the transmitted light on the plane into an image according to an electronic signal, and an image generating unit configured to extract and interpolate the converted image in each area so as to generate two different images.

Abstract: To increase the depth of field of an optical system, an inversion of the chromatism is produced. This accommodates the fact that, in natural light, users prefer, for their photographs, taking long distance shots outdoors, where the illuminant is mostly composed of blue, and short-distance shots indoors, where the illuminant is mostly composed of red. While optical devices naturally focus the blue components at a shorter distance than the red components, which is unfavorable, with an inversion of the chromatism, a focus more in keeping with what is required is restored.

Abstract: An image is obtained using a photographing unit including an optical system provided with an aperture and focus adjusting mechanism. Two or more types of subjects are detected from the image. When the two or more types of subjects are detected from the image, one priority subject is determined among the two or more types of subjects. The aperture and the optical system are adjusted so that the priority subject is focused and the subject other than the priority subject is within a depth of field of the photographing unit.

Abstract: A zoom lens includes a movable aperture-control lens group, and a variable aperture-stop mechanism provided in front or behind the aperture-control lens group. The variable aperture-stop mechanism includes an aperture blade opening/closing mechanism including at least one movable aperture blade and varies the size of an adjustable aperture. The variable aperture-stop mechanism includes a fixed circular aperture which is smaller than a large-sized adjustable aperture and greater than a small-sized adjustable aperture. The movable aperture blade and the fixed circular aperture are positioned in that order from the aperture-control lens group side. When the zoom lens retracts to the accommodated position thereof, the adjustable aperture enlarges in size while the variable aperture-stop mechanism moves to a close position to the aperture-control lens group, so that at least part of the aperture-control lens group enters the large-size adjustable aperture.

Abstract: A zoom lens includes a zoom optical system including movable lens groups for zooming which are moved between a ready-to-photograph position and an accommodated position, a diaphragm mechanism, and a lens shutter. One of the movable lens groups serves as an aperture-control lens group. The diaphragm mechanism and the lens shutter are positioned in front of and behind the aperture-control lens group and are movable relative to the aperture-control lens group in the optical axis direction. The diaphragm and the lens shutter are moved to close positions to the aperture-control lens group when the movable lens groups are moved to the accommodated position. Both apertures of the diaphragm mechanism and of the lens shutter are widely opened to allow the aperture-control lens group to partly enter the apertures when the diaphragm mechanism and the lens shutter are moved to the close positions.

Abstract: The present invention relates to a control method of a photographing apparatus, the photographing apparatus and a control program, which are capable of automatically determining a photographing mode capable of generating a sharper image. If a first exposure time is equal to or shorter than a first threshold value, a control circuit 18 makes a decision to take an input image in a first mode. The first exposure time is an exposure time required for taking one input image on the assumption that a photographing operation is carried out in the first mode for generating one output image by taking one input image. If the first exposure time is neither equal to nor shorter than the first threshold value, on the other hand, the control circuit 18 makes a decision to take a plurality of input images in a second mode provided that a second exposure time is equal to or shorter than a second threshold value.

Abstract: In a photographing apparatus, while a deterioration of a contrast characteristic caused by an optical zooming operation is prevented, superior photographic images are continuously acquired. Magnification set by an optical zooming function is acquired, and a gamma curve, namely gradation correcting information is set to a gamma lookup table, while the gamma curve is applied during a photographing operation based upon the acquired set magnification. A gamma correcting unit corrects gradation of image data (namely, RAW data) outputted from an imaging element by employing gradation correcting information set in this gamma lookup table.

Abstract: A digital camera simulates the use of fill flash. The camera takes a series of photographs of a scene at various focus distances. The photographs are stored, along with their corresponding focus distances. The photographs are analyzed to determine the distance to objects at various locations of the scene. Regions of a final photograph are selectively adjusted in brightness based on the distance information to simulate the effect that would have resulted had fill flash been used.

Abstract: The CPU 120 acquires zoom level sent by the zoom lens position detector 122, and on the basis of the acquired zoom level calculates a exposure target value depending on the particular zoom level. The CPU 120 establishes in the imaging controller 105 an exposure target value R calculated depending on zoom level Z, and issues an imaging command to the imaging controller 105. By so doing, the average value of gradation values of the white portion in the imaged image can be substantially maintained at the desired tone level.

Abstract: A lens barrel includes an optical system including a short focal length for a wide angle of view; and an ND filter in the shape of a disc which is provided on an optical axis of the optical system. An optical density of the ND filter decreases in a direction radially outwards from a center of the ND filter.

Abstract: An imaging device according to the present invention has: a photometric circuit that detects a brightness of a photographic subject based on a light flux from the photographic subject that passes through a photographic lens; an exposure calculation circuit that calculates an aperture value and a shutter speed based on the detected brightness of the photographic subject; an imaging element that converts the light flux from the photographic subject received on each photo-electric element to an electric signal and outputs the electric signal, the imaging element having a plurality of the photo-electric elements and a micro-lens in which each of micro-lens elements is arranged facing to each of the photo-electric elements in order to converge the light flux from the photographic subject to a light receiving surface of each of the photo-electric elements; and a correction circuit that corrects the aperture value calculated by the exposure calculation circuit so that a signal level of the electric signal of the lig

Abstract: An image forming apparatus automatically determines the photographing mode and displays on a display a kind of the photographing mode with the image of the subject. The image forming apparatus comprises an image pickup part for forming an image of the subject, a photographing mode automatically setting part for automatically selecting one photographing mode from among a plurality of photographing modes based on a photographing condition when the subject is photographed, and setting the selected photographing mode, a display part for displaying the image of the subject; and a display control part for displaying on the display part a kind of the photographing mode set by the photographing mode automatically setting part together with the image of the subject.

Abstract: A photometry device for a camera is provided with a normal light sensor having a spectral sensitive characteristics close to those of a human eye, and a plurality of colorimetric sensors. The device further includes a photometry value determining system, a colorimetric compensation value determining system that determines a color of an object at each of the plurality of photometry areas and a colorimetric compensation value based on the determined color, and an exposure value determining system that compensates for the photometry value determined by the photometry value determining system for each of the plurality of photometry areas, and determines an exposure value based on the compensated photometry values. In the photometry device configured as above, the colorimetric compensation value determining system determines different colorimetric compensation values for different one of the plurality of photometry areas.

Abstract: A photometry device for a camera is provided with a normal light sensor having a plurality of photometry areas, and a plurality of photometric sensors for colorimetry. A photometry value determining system determines a photometry value at each photometry area in accordance with outputs of the normal light sensor. A colorimetric compensation value determining system determines a color of an object at each photometry area in accordance with the outputs of the photometric sensors for colorimetry, and determines a colorimetric compensation value based on the determined color. An exposure value determining system compensates for the photometry value determined by the photometry value determining system for each o photometry area, and determines an exposure value based on the compensated photometry values. The colorimetric compensation value determining system determines different threshold values, which are used for determining colors at the plurality of photometry areas, for different photometry areas.

Abstract: The image reading-out apparatus is capable of always obtaining a good image irrespective of a luminance difference. A control unit controls storage times of a pair of image pickup devices through a timing generator independently, thus controlling these storage times to optimized values. Outputs of both of the image pickup devices are subjected to an AD conversion for a digital data processing, and then a synthesis of luminance is performed by a synthesizer. When an automatic mode is selected, a ratio of storage times of both of the image pickup devices is set so that a synthesized image with a suitable dynamic range is obtained in accordance with an object luminance range detected by a luminance range detection section.

Abstract: A method and apparatus to determine the fstop that provides optimal image resolution for a predetermined depth-of-field. An approximate and exact method and apparatus are provided to determine the optimal resolution fstop. The optimal resolution fstop is a function of the lens focal length, depth-of-field in front of the object, wavelength of light, and distance of the object to the lens center. Once the optimal resolution fstop is determined, the camera is adjusted to the closest discrete fstop available. When the approximate field technique is utilized, the camera must be adjusted to the discrete fstop closest to, but not exceeding, the computed fstop.

Abstract: An optical apparatus includes a first movable optical member, a second movable optical member, different from the first optical member, and a driving mechanism engaged with the second optical member, and operable in a first operation mode, in which the second optical member is movable by an electrical driving operation of the driving mechanism, and a second operation mode, in which the second optical member is movable by a manual driving operation. Operation of the driving mechanism is switched between the first operation mode and the second operation mode by control means such as a CPU, wherein, when the driving mechanism is operable in the second operation mode, the control means switches operation of the driving mechanism to the first operation mode in response to a driving operation of the first optical member.

Abstract: A fixed making frame for blocking the peripheral light is disposed between a taking lens aperture and an exposure frame of a film surface. The effective diameter of the taking lens aperture is variable so as to make an angular field of a photogtaphing light which extends from the taking lens aperture to an exposure area. The angular filed is smaller under a larger effective diameter than under a smaller effective diameter. A predetermined width of a periphery of the exposure area defines a non-print area, and the fixed making frame is disposed at a side adjacent to the taking lens aperture with respect to an intersection of the peripheral light which extends between an inner periphery of the non-print area and the lens aperture under a larger effective diameter of the taking lens, and a peripheral exposure light which extends the lens aperture and an outer periphery of the exposure area, under a smaller effective diameter of the taking lens aperture.

Abstract: A camera using an image blur prevention device including exposure time calculating apparatus which calculates a first exposure time from at least photometry data, sensitivity data of a recording medium and brightness of a photographic lens, a strobe lighting designating apparatus to forcibly light a strobe when the first exposure time calculated by the exposure time calculating apparatus is longer than a predetermined value, shutter closing time setting apparatus which forcibly fixes the first exposure time calculated by the exposure time calculating apparatus at a predetermined exposure closing time Tb or Td regardless of a calculated result of the exposure time calculating means when the first exposure time is longer than the second exposure time and changing apparatus which changes a combination of the first exposure time and the second exposure time dependently on whether or not the image blur prevention device is to be used for photographing, whereby the camera is capable of taking a photograph on which

Abstract: In order to realize a lens barrel or camera which is light in weight and small in size and which has performance as high as a single-focus lens, a photographing optical system employed in the lens barrel or camera has four lens groups, and at least two diaphragms are arranged at different positions. Despite the simple structure it has, the photographing optical system enables switching among a number of focal lengths. The diaphragms include: a first diaphragm (diaphragm unit A) arranged at a first inter-lens position defined inside the photographing optical system and controlling the amount of light passing through the system; and a second diaphragm (diaphragm unit B) arranged at a second inter-lens position defined inside the system and controlling the amount of light passing through the system.

Abstract: A camera is provided with a photographing device for setting various photographing conditions which determine a state of a subject image to be obtained as a picture, the photography device including an exposure device having a Plurality of selectively settable exposure modes for automatically setting at least one exposure value based on brightness of a subject, a mode selector for selecting one of the plurality of exposure modes, a calculation unit for calculating an amount indicative of the state of the subject image in accordance with the photographing conditions set by the photography device, an estimation unit for estimating visual effects which the subject image provides based on the calculated state amount, and a display device for displaying the visual effect corresponding to the exposure mode selected by the mode selection means in accordance with the estimated visual effects.

Abstract: A photometric operation system of a camera includes a photographing lens with a variable focal length. A plurality of photometering devices independently receive and detect rays of object light within a plurality of photometering areas of different sizes. A calculator determines the brightness of an object in accordance with the photometric data supplied from the photometering devices. A smaller photometering area is contained in the larger photometering area. The photometric data is weighted in accordance with the focal length of the photographing lens in the calculation of the object brightness by the calculator devices.

Abstract: A photometry device of a camera has a photometry circuit which measures the luminance value of the object field, a colorimetry circuit which measures the color balance of the object field, and a scene discrimination unit which discriminates the scene on the basis of the output from the colorimetry circuit. The device calculates the proper exposure value of the object field on the basis of the outputs from the photometry circuit and scene discrimination unit. Scene discrimination is preferably made using photographing mode information, photographing distance information, or current time information to improve discrimination accuracy.

Abstract: A lens barrel and a camera system are capable of precisely calculating a photographic magnification and a field range. The lens barrel having a focusing or zooming movable lens unit is stored with effective focal length data corresponding to a position of the movable lens unit, detects the position of the movable lens unit, outputs the corresponding effective focal length data and calculates the photographic magnification and the field range. An accuracy of a calculated value is thereby enhanced enough not to cause an underexposure on the whole or the underexposure in a peripheral portion as compared with a central portion.

Abstract: An imaging device according to the present invention has: a photometric circuit that detects a brightness of a photographic subject based on a light flux from the photographic subject that passes through a photographic lens; an exposure calculation circuit that calculates an aperture value and a shutter speed based on the detected brightness of the photographic subject; an imaging element that converts the light flux from the photographic subject received on each photo-electric element to an electric signal and outputs the electric signal, the imaging element having a plurality of the photo-electric elements and a micro-lens in which each of micro-lens elements is arranged facing to each of the photo-electric elements in order to converge the light flux from the photographic subject to a light receiving surface of each of the photo-electric elements; and a correction circuit that corrects the aperture value calculated by the exposure calculation circuit so that a signal level of the electric signal of the lig

Abstract: A camera having a photographic mode automatic selecting apparatus. A photographic mode selecting device selects a photographic mode from a plurality of photographic modes. A photographic distance detecting device detects photographic distance data of a photographic lens. The photographic mode selecting device selects an appropriate photographic mode from the plurality of photographic modes based on the photographic distance data of the photographic lens.

Abstract: A position detecting device comprises a pattern member having conductive patterns arranged in plural tracks; a slidable member having plural sliding pieces capable of sliding on the conductive patterns, wherein each of the sliding pieces assumes either a conductive state in contact with one of the conductive patterns or a non-conductive state not in contact with the conductive pattern; a signal processing device for detecting sets of the conductive patterns and the sliding pieces in conductive state, by transmitting electrical signals through the conductive patterns and the sliding pieces; and a discriminating device for identifying the relative position between the conductive patterns and the sliding pieces when the the conductive patterns and the sliding pieces in conductive state are detected at least a predetermined number of times or over at least a predetermined period of time.

Abstract: A flash-assisted photographing system including a camera having a taking lens capable of varying the focal length and a flash is provided with a light receiving unit having a plurality of receiving areas operable to separately receive light reflected by different areas of a photographic view, a detector operable to detect a focal length of the taking lens, and a controller operable to set weights for the receiving areas based on a detected focal length. Proper weights are set for the receiving areas even in the case of close-up photography which is highly influenced by camera shake. A main subject can be reliably exposed at a proper light emission.

Abstract: A device and a method for sensing brightness, by which a sensing area for measuring the brightness of an object is varied. The variation of the brightness sensing unit is in response to the variation of an image angle that varies according to the zoom position of the lens of a zoom camera. In this manner, photographs with optimum exposure can be obtained. The device comprises a zoom position sensing unit, a brightness sensing unit, and a control unit.

Abstract: A photometry part measures a brightness within a shot visual field. A focusing part measures a distance up to a main subject. A focal length measuring part measures a focal length of a taking lens. A strobe light control part directs a strobe to flash regularly and decreases a strobe exposure gradually from a standard exposure in accordance with the measured parameters. The measured distance at which the exposure of the strobe is decreased, is defined as the strobe changeover distance. The strobe light control part sets the strobe changeover distance to be long as the focal length at photographing becomes long, so that the exposure of the main subject on the image surface can be kept proper.

Abstract: A camera having a zoom lens. The camera includes a shutter, an aperture and program exposure mode control. The program exposure control includes one or more reference program characteristics representing combinations of shutter speed and aperture corresponding to one or more of a portrait mode, a landscape mode and a close up mode. Each reference program characteristics define a predetermined aperture in a first range from a low shutter speed to a hand-induced vibration limit and defines a different aperture in a second range beyond the hand-induced vibration limit. One of the reference program characteristics is selected, wherein the hand-induced vibration limit is defined in accordance with a focal length of said zoom lens.

Abstract: A camera system that includes a zoom lens having a zooming lens unit and a zoom mechanism which supports the zooming lens unit to move in the optical axis directions, and a camera body to which the zoom lens is detachably mounted. The zoom lens has a motor drive mechanism for driving the zoom mechanism to move the zooming lens unit in the optical axis direction, a lens controller for controlling the drive of the motor drive mechanism, a switching mechanism for performing a predetermined control operation on the lens controller, and a lens input and output device for effecting data communication with the camera body. The camera body has a body controller for controlling operations of the entire camera system, and a body input and output device for effecting data communication with the zoom lens through the lens input and output device.

Abstract: An interchangeable lens camera including an interchangeable lens having a photographic optical system, a lens mount to mount the interchangeable lens, a lens side communication terminal to communicate, a storage circuit to store lens data representing an optical property of the photographic optical system of the interchangeable lens, and a lens side communication device to transmit the lens data stored in the storage circuit through the lens side communication terminal, and a camera body having a body mount engageable with the lens mount to mount the interchangeable lens on the camera body, a sensor to receive light from a field through the photographic optical system and to generate an output corresponding to the light received, a processing circuit to process the output generated from the sensor and to output a condition signal, based on the processed output, indicating a condition of a subject image formed by the photographic optical system, a body side communication terminal connected to the lens side com