Automatic focus detecting device for camera

[Detailed Description of the Invention]

The Looking skin summer degree (Field of the Invention) present invention relates to improvement of the automatic-focusing detecting device of a camera which has an autofocus optical system. (PRIOR ART) From the former, there is an automatic-focusing detecting device of the camera which has an autofocus optical system. For example, Drawing 18 shows the schematic structure of the optical system of the automatic-focusing detecting device of a single-lens reflex camera which has an autofocus optical system. As for a photographing lens and 2, in 1, in the Drawing 18, a photographic subject and 3 are view masks, As for a condensing lens and 5, in 4, an iris diaphragm mask and 6.7 are the separator lenses as an image division optical element, 8 is to a photo acceptance unit. It is CCD to carry out, and view mask 3. condensing lens 4. iris diaphragm mask 5. separator lens 6.7 *CC08 constitute autofocus optical system 9, and this autofocus optical system 9 is modularized and constitutes a focal unit. View mask 3 of autofocus optical system 9 is provided near the film equivalent face 10. Film equivalent face 10 is in conjugate physical relationship optically with photographic subject 2 via photographing lens 1. When photographing lens 1 is in a focus state, it is formed in the film equivalent face 10 where photographic subject's 2 image 11 is focused. It has the function to divide into two light flux the photography light which extracts as condensing lens 4 and passes the right and left of photographing lens l in mask 5, and separator lens 6.7 is in conjugate physical relationship optically with photographing lens l via condensing lens 4. The Separator lens 6.7 is horizontally arranged, as typically shown in Drawing 19. It is looking in at virtual opening field 14.15 of ejection pupil 13 of photographing lens 1 carried in lens mount (illustration is omitted) via a central ranging zone (refer to numerals 17 of Drawing 22) of a finder established in a main part of a camera, and ranging zone 12 in a conjugate optically position. The light flux which passed through the opening field 14.15 is taken by separator lens 6.7, and two fields on image llffiCCD8 formed in film equivalent face 10 with separator lens 6.7 Bowing as image 11. About the image interval at the time of the focus of the re-formed image 11 (refer to the 20511st (a)), as shown in Drawing 21, it is Here . It carries out. On the other hand, as shown in Drawing 20 (b), when the focus of photographing lens 1 suits by the front side compared with the time of a focus, the interval of signal S corresponding to [an image interval narrows and] this -- Q -- also depending -- it becomes small, and as shown in Drawing 20 (C), when the focus of photographing lens 1 is correct by the backside compared with the time of a focus, as it is shown in Drawing 21, an image interval spreads and the interval of signal S corresponding to this becomes larger than 2 *. With the automatic-focusing detecting device of the single-lens reflex camera of the former [be / proportional to the amount of defocusing of photographing lens 1 / change of this image interval] for example, The image interval of the CCD 8 is detected, operation processing of this is carried out, and photographing lens l is made to move in the focus position with the defocusing direction and the amount of defocusing of photographing lens 1. And as shown in Drawing 22 for example, when composition is decided that desired photographic subject 2 goes into central ranging zone 17 provided in the center of finder 16 and W!i Distance is performed, If it is moved even to a focus state and photographing lens 1 takes a photograph in the state automatically, the photography photograph focused on photographic subject 2 can be acquired. Since the ranging zone is provided in the center of finder 16 in (Object of the Invention) and time with the automatic-focusing detecting device of this conventional single-lens reflex camera, the way things stand, as for the acquired photograph, desired photographic subject 2 will be located in the center of a photograph. However, there is a case where he would like to acquire the photography photograph which Redox (ed) desired photographic subject 2 not around a center but around the photograph. So, in consideration of that, the focal locking mechanism is provided in the conventional single-lens reflex camera, Photographic subject 2 is located in the center of finder 16, the distance to photographic subject 2 is ranged automatically, a focal lock is covered in the state, and if a photograph is taken by performing flaming as shown in Drawing 23, the photography photograph which has stationed desired photographic subject 2 in the circumference part can be acquired. With however, the automatic-focusing detecting device of this conventional single-lens reflex camera, Photographic subject 2 is once located in the center of finder 16, and -ti shadow lens l is moved even to a focus state, Photographing lens 1 is fixed, covering a focal lock in this state, and in order to have to complete the photography procedure of taking a photograph by deciding composition again, there is a problem that photography operation takes time and effort too much. the central ranging zone of a finder where the 1st object of That , Trowel , and the present invention was provided in the main part of a camera -- optical -- abbreviated -- while arranging the ranging zone of an autofocus optical system in the position in the conjugate main part of a cameraA circumference part ranging zone is established in the right-and-left both sides of the central ranging zone of the finder, this circumference part ranging zone -- optical -- abbreviated -- arranging the ranging zone of the autofocus optical system for circumference part ranging in the position in the conjugate main part of a cameraWhen a desired photographic subject wants to acquire the photography photograph which is not in the center of a screen, even if it does not complete a troublesome photography procedure, the autofocus optical system for the circumference part ranging is used, The distance to a photographic subject is ranged automatically, the photographing lens carried in lens mount is made to move, a photographing lens is focused, and it is in providing the automatic-focusing detecting device of the camera which can perform easily quickly photography operation for acquiring the photography photograph which has stationed the desired photographic subject in the circumference part. Next, if the separator lens of the autofocus optical system for circumference part ranging is not looking into the ejection pupil of the photographing lens at an angle of predetermined when the automatic-focusing detecting device of a camera is constituted in this way, in response to the influence of Vignetting , the image detecting accuracy of an autofocus optical system will deteriorate. Then, lens performance of the photographing lens carried in the lens mount detached and attached by the main part of a camera, For example, according to whether a photographing lens is a short focus or it is a long focus, the separator lens of the autofocus optical system for circumference part ranging will adjust each time the angle which looks into the ejection pupil of photographing lens 1, and must set it up. According to whether the photographing lens carried in this lens mount is a short focus, or it is a long focus, the separator lens of the autofocus optical system for circumference part ranging performs the adjustment and a setup of an angle which looks into the ejection pupil of a photographing lens with manual operation, If an example is taken by various kinds of lens groups being prepared as exchangeable lens mount detached and attached by the main part of a camera, trouble will be produced in the present rank-ization of the main part of a camera. Then, the 2nd object of the present invention, It is in providing the automatic-focusing detecting device of the camera which can perform adjustment and a setup of an angle so that direction of the light flux which the autofocus optical system for circumference part ranging takes automatically according to wearing on the main part of a camera of lens mount may go in the direction of the ejection pupil of a photographing lens. (Means for solving problem) The 1st feature of the automatic-focusing detecting device of the camera concerning the present invention, In order to achieve this 1st object, a circumference part ranging zone is established in the right-and-left both sides of the central ranging zone of a finder, this circumference part ranging zone -- optical -- abbreviated -- arranging the ranging zone of the autofocus optical system for circumference part w4 Distance in a conjugate positionWhen a desired photographic subject wants to acquire the photography photograph which is not in the center of a screen, even if it does not complete a troublesome photography procedure, using the autofocus optical system for the circumference part ranging, the distance to a photographic subject is ranged automatically and it is in the place it enabled it to photo quickly. The optical member for changing an angle automatically so that direction of the light flux which the autofocus optical system for circumference part ranging takes may go in the direction of the ejection pupil of a photographing lens, in order that the 2nd feature of the present invention may achieve the 2nd object, It is in the place established in the front of the focal unit which constitutes each autofocus optical system. The 3rd feature of the present invention is an autofocus optical system for each circumference part ranging, and an optic axis of the ranging zone as other composition for achieving the 2nd object, at the time of wearing on the main part of a camera of a photographing lens, it operates by the engagement part provided in ta pipe of the above-mentioned photographing lens, and this engagement part -- making -- it is in the place constituted so that it might turn to the direction of a center of the ejection pupil of the abbreviated above-mentioned photographing lens by a 9 To mechanical interlocking means. (EXAMPLE) The example of the automatic-focusing detecting device of the camera concerning the present invention is described to it, referring to drawings to below. 1st [ The ] figure~figure 14 is for describing the 1st example of the automatic-focusing detecting device of the camera concerning the present invention. Here, the case where it applies to a single-lens reflex camera is explained. Drawing 10 shows notionally the optical system of the automatic-focusing detecting device of the single-lens reflex camera. In this Drawing 10, the same numerals are Attached 9 ing about a conventional example and an identical configuration element. it sets to the Drawing 10 -- 13 is ejection IF (direction shown as the solid line) of photographing lens 1 looked into through ranging zone 12 of autofocus optical system 9. This ejection 111113 is an approximate circle form, as shown in Drawing 12. Opening field 14. Is looked into through separator lens 6.7 is approximately elliptical type. Here, they are 1g of autofocus optical systems for circumference part ranging to the right-and-left both sides of autofocus optical system 9.19 is provided. For example, the schematic structure of the autofocus optical system 18 is carried out from separator lens 20.21 as a pair of image division optical elements, and CCD22. Again. The schematic structure of the autofocus optical system 19 is carried out from separator lens 23.24 as a pair of image division optical elements, and CCD25. As shown in Drawing 11 at finder 16 provided in main part A of a camera, it is made to correspond to autofocus optical system 18.19 for the circumference part ranging, and circumference part ranging zone 26.27 is established in the right-and-left both sides of the central ranging zone 17. this circumference part ranging zone 26.27 -- autofocus optics and 'a Distance zones 28 and 29 of ltlL 19 -- optical -- abbreviated -- to the extent that conjugate -- I! It shall have a relation. In Drawing 10, separator lens 20.21. separator lens 23.24 is, passing condensing lens 4 which is arranged in the up-and-down direction, respectively, and omits illustration -- ejection pupil 13 of photographing lens 1 -- optical -- abbreviated -- being considered as a conjugate arrangement relation -- ranging zone 2L -- it is looking in at opening field 30.31 of the up-and-down direction of the ejection [113 via 29. Thus, separator lenses 20 and 21 and separator lens 23-24 have been arranged in the up-and-down direction, Light flux which enters into ranging zone 28.29 via photographing lens 1 turns into # light flux, and ejection pupil 13 of photographing lens 1 seen from w4 Distance zone 28.29 serves as shape flatly crushed as shown in 13th rj4 in response to Vignetting . It is because base length between lenses of separator lens 20.21 (separator lenses 23 and 24) cannot fully be secured, but a fall will be caused to performance of - lens by extension and detecting accuracy of an image interval will deteriorate, if opening field 30.31 is provided horizontally. In the Drawing 10, a is a main optic axis of the optic axis of photographing lens 1, Sadness , the main optic axis of Is autofocus optical system 18, Sadness , and Is autofocus optical system 19, it optic-axis [main] a Is and a2 is exchanging at the center 01 of ejection pupil 13. "11 are an optic axis of the optic axis of separator lens 20, a Work , and Is separator lens 21. As for Q7□, the optic axis of separator lens 23, A disease , and 2 are the optic axes of separator lens 24, Optical axis sadness , 1, and [1 cross at center 02 of opening field 31, and optic axis Q12 and "27 cross at center 03 of opening field 30. Thus, zone 26.27 for circumference part ranging is established in the right-and-left both sides of central ranging zone 17 of finder 16, If it is made to correspond to the circumference part ranging zone, autofocus optical system 18.19 for circumference part ranging is established and CCD 8 and 22.25 corresponding to ranging zone 17.26. 27 (refer to the 11th figure) to choose is made to drive, It is possible to range photographic subject 2 automatically according to autofocus optical system 9.18. 19 corresponding to the selected ranging zone 17.26. 27. By the way, as shown in Drawing 1, generally exchangeable lens mount B is made removable at main part A of a camera. Here, the case where it is short focus lens 33 as shown in the case where it is long focus lens 32 as photographing lens 1 carried in the lens mount B shows in Drawing 9, and Drawing 8 is considered. In this case, generally optic-axis Sad Q2 of autofocus optical system 18.19 for circumference part ranging should differ in angle 0 made into optic axis Q of that photographing lens 1, and should be shown in Drawing 14, Separator lens 20.21 of autofocus optical system 18 is made to look in at Open [1 field 35.38 of ejection 11iff34 of photographing lens 1 consisting of long focus lens 32. The influence of Vignetting at the time of making separator lens 23.24 of autofocus optical system 19 look in at opening field 36.37 of ejection 11iif34 is taken into consideration, Is photographing lens 1 either of short focus lens 33. long focus lenses 32? It is separator lens 2 (changing the angle through which L 21.23. 24 look into ejection 1113.34 of photographing lens 1). It is an opening field of ejection which must have composition which changes optic-axis [of photographing lens 1] a, and optic-axis m1.1. of autofocus optical system 18.19 and which looked into 3L40 through separator lens 6.7 in the Drawing 14 in addition 1iif34. In then, the front of focal unit 50 which is incorporated in main part A of a camera, and constitutes each autofocus optical system 9.18. 19 as shown in Drawing 1, Optical member 51 for separator lens 20.21. 23.24 of autofocus optical system 18.19 for circumference part ranging to change the angle which looks into photographing lens 1 is provided. In other words, optical member 51 as an angle alteration means for changing an angle so that direction of the light flux which autofocus optical system 18-19 takes may go in the direction of the ejection pupil of photographing lens 1 is provided. This optical member 51 is composition Being by a light transmittance state rotation board, as shown in Drawing 2 and Drawing 4. This optical member 51 is manufactured by integral moulding using plastics material, for example. Optical member 51 consists of central equal thickness pellucide area 52 which faces autofocus optical system 9, and prism part 53 formed around the central equal thickness pellucide area 52 cyclic. As shown in 5th [ The ] figure~figure 7, equal thickness pellucide area 54.54, and prism 55.. 55.56 and 56 are provided in the prism part 53. These prisms 5K and 55.56. 56 have the thick outside side to the inside diameter side of optical member 51. Crowd alpha of - prism 55.56 shall differ mutually here, as shown in Drawing 5 and Drawing 7. Rotating member 57 which will mention the function of prism part 53 below, next supports this optical member 51 is explained. Rotating member 57 is rotatably supported movably with four rollers 58.58. 58.58 here, as shown in Drawing 2. Guide rail 59 which shows rotating member 57 to the roller 58.58. 58.58 as shown in Drawing 3 is formed in the perimeter. roller 58.58. 58-58 is supported pivotally with this example so that the rotation to pivot 59' is possible, and pivot 59' is attached to gobo 60, for example -- 61 is the opening drilled by that gobo Go. Rotating member 57 is rotated by motor 62, and gear part 65 which gears with gear 64 attached to output axis 63 of motor 62 is provided in the peripheral part of rotating member 57. Motor 62 is driven by motor drive circuit 66, and motor drive circuit 66 is controlled based on instructions of microprocessor 67. Microprocessor 67 controls motor drive circuit 66 in response to the information on lens ROM6g provided in exchange lens mount B. the connection bottle in which 69 was provided in lens mount B in Drawing 1 and 7G -- main part A of a camera -- providing -- in 9 Connection terminal and Drawing 4, 71 shows an opening. Microprocessor 67 is at this example, When main part A of a camera is equipped with lens mount B which has short focus lens 33, When main part A of a camera is equipped with lens mount B which is shown in Drawing 8 and which carries out drive control of the motor 62 like so that equal thickness pellucide area 54 may attend ranging zone 28.29, and has long focus lens 32, be shown in Drawing 9, Drive control of the motor 62 is carried out, and rotation of rotating member 57 is stopped in the position so that prism 56 may attend ranging zone 28.29. The angle through which separator lens 20.21. 23*24 of autofocus optical system 18.19 for circumference part ranging looks into the ejection pupil of photographing lens 1 is automatically changed by this. That is, when main part A of a camera is equipped with lens mount B which removes lens mount B which has short focus lens 33 from main part A of a camera, for example, and has long focus lens 32, Optical member 51 rotates centering on virtual center Z (refer to the 2nd figure), and it is stopped in the position which prism 56 faces ranging zone 28.29. Separator lens 2G-21, 23, and the angle through which 24 looks into the ejection pupil of photographing lens 1 are automatically changed into 0 to 0' by this. If ranging zone 28.29 is made to face prism 55, separator lens 2G, 21*23, and the angle through which 24 looks into the ejection pupil of photographing lens 1 are changed into angles other than 0 *0', and the photographing lens which has other focuses can be made to suit. As mentioned above, it is although microprocessor 67 explained motor 62 in the 1st example as composition which carries out drive control in response to the information on lens ROM6g provided in lens mount B, Even when there is no information on lens ROM6g, continuation rotation of the rotating member 57 is carried out by microprocessor 67 simultaneously with wearing on main part A of a camera of lens mount B, The light income of CCD22-25 detects the rotation position used as the maximum by the microprocessor 67, Rotation of rotating member 57 can be stopped in the rotation position, and separator lens 20-21.23. 24 can also consider the angle which looks into the ejection pupil of photographing lens 1 as the composition automatically changed into 0 to 0'. Next, the 2nd example of the automatic-focusing detecting device of the camera concerning the present invention is described, referring to The 15th figure~figure 17. This 2nd example shows other examples of an angle alteration means, and is Optical axis consideration of photographing lens 1, and optic axis i of autofocus optical system 18.19 by a mechanical mean, It has composition which changes angle 0 with a in which it succeeds (it is made to change), and sets to Drawing 15, Maintenance case 142 is fixed to the prescribed position of main part A of a camera, and maintenance case 143.144 is arranged at the both sides of maintenance case 142, In this maintenance case 142, above-mentioned autofocus optical system 9 is stored, and unit-ized autofocus optical system 18.19 is stored in maintenance case 143*144, respectively. An angle alteration means is constituted by optic angle degree automatic alteration means 141, and optic angle degree automatic alteration means 141 has a pair of pivots 145, 146 fixed to the figure Nakagami undersurface of maintenance case 143 at the same axle, and a pair of pivots 147, 148 fixed under figure Nakagami of maintenance case 144 at the same axle. These pivots 145, 146 and 147.148 are held with film equivalent face 10 at the support plate which omits illustration of main part A of a camera, enabling the in parallel and free 15th left-in-the-figure rightward movement, and they are provided in the circumference of an axis so that rotation is possible. while maintenance case 143, 144 can carry out forward/backward moving to maintenance case 142 by this -- pivot 145, 146 and 14 F -- 148 -- a center -- like arrow 149, 150 -- it can rotate -- coming -- Listen . And when optic angle degree automatic alteration means 141 equips main part A of a camera with lens mount B of a photographing lens, It engages with engagement hole (engagement part) 152 provided in lens mount B of photographing lens 1, Pivot 146.148 is rotated according to the focal length of photographing lens 1, and they are 1 g of autofocus optical systems for circumference part ranging, Mechanical driving means 153 (mechanical interlocking means) which makes optic axis fifiz of 19 and its ranging zone 28.29 turned to the center of the ejection pupil of photographing lens 1 is established. This mechanical driving means 153 has link 154, 155 to which the end part was fixed to the lower end part of pivot 146.148, and pivot 156 which has connected the other end of link 154, 155 enabling free rotation. Optical axis sadness and an axis are made to intersect perpendicularly in this pivot 156, and it is held out of the main part of a camera free [attitude work], the direction, i. e., the optic-axis 2-way, of arrow 156a. Drive link 157 which was held as for mechanical driving means 153 enabling rotation of an end part free to pivot 156, Engaging-of-clutch pin 158 which protruded on the other end of drive link 157, and was made to project from lens mount part [besides the main part of a camera] B by the method of outside, It has spring 159 in which the counter direction, i. e., engaging-of-clutch bottle 15g, is energizing drive link 157 with the pivot 156 side in the direction projected from lens mount part [besides the main part of a camera] B to the method of outside. When this engaging-of-clutch pin 158 equips with lens mount B of -m shadow lens 1 out of the main part of a camera, it is made to insert it in engagement hole 152, and that tip is made to contact the bottom of engagement hole 152 with spring 159 at it. And this engaging-of-clutch bottle 15B is provided so that forward/backward moving may be carried out to parallel with Light devout . Depth D of engagement hole (engagement part) 152 with which this engaging-of-clutch pin 158 engages, When it is set up so shallowly that the focal length of photographing lens l is short, and it equips with lens mount B of photographing lens 1 out of the main part of a camera and engaging-of-clutch pin 158 is inserted in engagement hole 152, 5 mechanical driving means 153 is passed, and they are 1 g of autofocus optical systems for circumference part ranging, It is set to the depth which makes optic-axis i1. g of 19 and its ranging zones 2g and 29 turned to the center of the ejection pupil of photographing lens 1. The 16th figure (b) shows an example of depth D of engagement hole 152 in case photographing lens 1 is a long focus, and The 16th figure ( Ro ) shows an example of depth D of engagement hole 152 in case photographing lens 1 is a short focus. Therefore, when it equips with lens mount B of a photographing lens out of the main part of a camera, Engaging-of-clutch pin 158 engages with engagement hole 152, the projection amount to the outside of the main part of a camera of engaging-of-clutch bottle 15g is changed by engagement hole 152 according to the focal length of photographing lens 1, and this drive link 157 is made to carry out forward/backward moving to an optic-axis 2-way. While link 154, 155 is rotated by the circumference of the axis of pivot 146.148 and maintenance case 143.144 is rotated by this by the circumference of pivot 146, 148, Pivot 146.148 is made to carry out relativity approach or relative Battalion , and the side in which Distance measurement zone 28.29 was established in rotation End of maintenance case 143, 144 is made to carry out approach estrangement. Optic axis fi of 1 g of autofocus optical systems for circumference part ranging, 19, and ranging zone 28*29 of those and fi can be automatically turned to the center of the ejection pupil of a photographing lens. An automatic-focusing detecting device of the camera concerning the Seeing blood present invention, the central ranging zone of a finder established in the main part of a camera as explained above -- optical -- abbreviated -- while arranging the ranging zone of an autofocus optical system in the position in the conjugate main part of a cameraestablishing a ranging zone in the circumference part of the central ranging zone of that finder -- this circumference part ranging zone -- optical -- abbreviated -- since the ranging zone of the autofocus optical system for circumference part ranging has been arranged in the position in the conjugate main part of a cameraWhen a desired photographic subject wants to acquire the photography photograph which is not in the center of a screen, even if it does not complete a troublesome photography procedure, the effect that a photograph can be taken quickly is produced. Again. since it carries out for performing adjustment and a setup and comes out so that direction of the light flux which the autofocus optical system for circumference part ranging takes automatically according to wearing on the main part of a camera of a lens may go in the direction of the ejection pupil of a photographing lens when constituted in this way6 which the effect that the influence of Vignetting is automatically removable also plays

[Brief Description of the Drawings]

Drawings 2 are a schematic diagram showing the whole camera composition which requires Drawing 1 for the present invention, and a top view expanding and showing the rotating member and optical member which are shown in Drawing 1, The side view and Drawing 4 which Drawing 3 expands the rotating member and are shown are Drawings 3. - It is a longitudinal section of the shown rotating member, 5th [ The ] figure~figure 7 is a sectional view for explaining the shape of the prism part shown in Drawing 2, Drawing 814th [the] and 9 is an explanatory view for explaining the operation of the 1st example of the automatic-focusing detecting device of the single-lens reflex camera concerning the present invention, the -- the perspective view showing typically the arrangement state of the autofocus optical system of the automatic-focusing detecting device of the camera which requiresO [1] figure for the present invention, Drawing 11 -- the top view of the finder of the automatic-focusing detecting device, and Drawing 12 -- the photographing lens of the camera -- the central ranging zone of a finder -- optical -- abbreviated -- the explanatory view for explaining the relation of the ejection pupil and opening field which were looked into through the ranging zone of a conjugate autofocus optical system, Drawing 13 is an explanatory view for explaining the relation of the ejection pupil and opening field, when the ejection pupil shown in Drawing 10 receives Vignetting . Drawing 14 is a mimetic diagram for explaining the relation between a short focus lens and a long focus lens, Drawing 15 is an explanatory view for describing the 2nd example of the automatic-focusing detecting device of the camera concerning the present invention, and is an approximate account figure of an optic angle automatic alteration means, Drawing 16 is an explanatory view showing the relation of the engagement hole and engaging-of-clutch pin which are shown in Drawing 15, Drawing 17 is a figure for explaining signs that the main optic axis of the autofocus optical system for circumference part ranging and the optic axis of a photographing lens change depending on whether the photographing lens is a long focus lens or it is a short focus lens, In Drawings 19, Drawing 18 is a mimetic diagram of the optical system of the automatic-focusing detecting device of the conventional camera, and a perspective view showing roughly the arrangement state of the autofocus optical system shown in Drawing 18, An explanatory view for Drawing 20 to illustrate the focus by the automatic-focusing detecting device and Drawing 21 are explanatory views of the detection output of CCO of the automatic-focusing detecting device. An explanatory view for Drawing 22 to illustrate the arrangement state to the finder of the conventional ranging zone and Drawing 23 are explanatory views for explaining a photography procedure in case a desired photographic subject acquires the photography photograph which shifted from the center to right and left using the conventional automatic-focusing detecting device. ■ -.. [... Injection , ] A photographing lens and 2... Photographic subject 9.. - autofocus optical system 1316, -, and finder 17... Central ranging zones 18 and 19... Autofocus optical systems 26 and 27 for circumference part ranging... Circumference part ranging zone, 28.29, -, and ranging zone 32... A long focus lens and 33.. - short focus lens 34.. Ejection pupil of - long focus lens, 50- and a focal unit, and 51... Optical member 52, -, and central equal thickness pellucide area, 53... Prism part 57 and a one-revolution member, -62.. \ motor 6 Huu.. Microprocessor, 68... Lens RONA... Main part of a camera, B... lens mount 152... 15g of engagement hole (engagement part) 153, -, and mechanical driving means (mechanical interlocking means) ... Drawing 2 3rd figure [of engaging-of-clutch pin 1st figure rl-: When ] -°11 figure 4 zeta 1 -- an 8 \alpha figure 8 11th figure 1'1r person! V A ~Ha! Drawing 19 of the Drawing 15 16th figure 18th Cause