JP2003195146A - Optical equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide optical equipment such as a camera capable of fine zooming without giving the feeling of incompatibility. <P>SOLUTION: The optical equipment has a photographic lens in which a plurality of lens groups are moved in an optical axis direction with respect to an imaging surface so as to adjust image magnification and realize photographing at a discontinuous focal distance, and a trimming information imparting means for imparting trimming magnification for the real focal distance of the photographic lens to an image recording medium at the time of photographing in order to designate a range to be printed on the image recording medium exposed through the photographic lens. At least one or more pseudo focal distances (W', W", Zp1', Zp2' and Zp3') are provided between the discontinuous adjacent real focal distances (Wide, Zp1, Zp2 and Zp3) of the photographic lens. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device such as a camera having a pseudo zoom mechanism and a taking lens which alternately performs a focus adjusting operation and a magnification switching operation, and more particularly to a lens group by rotating a zoom ring. By moving the lens along the guide (cam stroke) along the optical axis, it is possible to select multiple zoom positions and perform focus adjustment (focus adjustment) on an object at infinity to a near object.
The present invention relates to optical devices such as m-film cameras, digital cameras and video cameras.

[0002]

2. Description of the Related Art As a camera as an optical device having a taking lens for alternately performing a focus adjustment operation and a magnification switching operation, Japanese Patent Publication No. 6-100707 and JP-A 9-802.
A device provided with a magnification switching device and a zoom position switching device described in Japanese Patent No. 91 is known. FIG. 40 is a main part of a magnification switching device in which a zoom position is selected and a focus is adjusted by rotating a zoom ring in a two-group zoom lens composed of two lens groups proposed in Japanese Patent Publication No. 6-100707. It is a schematic diagram.

FIG. 41 is an enlarged explanatory view of the movement locus of FIG. In the figure, 101 is a convex lens unit, 102 is a shutter blade that also serves as a diaphragm, 103 is a concave lens unit, 1
Reference numeral 04 is a view in which the upper part of the shooting screen is in a short focal length (hereinafter referred to as WIDE) state and the lens focus is at ∞, and the lower part is in a long focal length (hereinafter, TEL).
(E), the lens is in the closest focus, and the arrows C, M1 to M4, shown in the middle,
N1 to N3 represent the positions on the optical axis of the lens units 101 and 103 for the respective rotation angles of the zoom ring drawn on the right side. That is, arrows C, M1 to M4, N1
N3 represents the movement process (trajectory) of each lens group when the horizontal axis represents the amount of lens movement and the vertical axis represents the rotation angle of the zoom ring. When the zoom ring is rotated by 30 ° from the state where the lens focus is at ∞ at the WIDE zoom position in FIG. 40, the convex lens unit 101 and the shutter 10
2 and the concave lens unit 103 move integrally as shown. For this reason, the magnification of the taking lens system does not change between the arrows M1, and the focus is adjusted in the WIDE state by the rotation of the zoom ring, and the lens focus is brought to the closest distance at the position of 30 °.

When the photographer wants to increase the magnification a little more and switches to the normal (hereinafter referred to as NOM) mode, the zoom ring stops at a position between 120 ° and 150 ° based on the distance measurement information.

That is, as is already clear, when the rotation of the zoom ring comes to the position of 120 °, the NOM state (TELE and W
The lens position is in focus at ∞ in the intermediate magnification state of IDE). When the zoom ring is further rotated from this state, the lens system is fully extended for 30 ° as in the case of WIDE, and focus adjustment is performed in the NOM state. Also in the TELE mode, if the zoom ring is rotated 180 °, the lens focus will come to the infinity with TELE, and if the zoom ring is further rotated, the lens position will be brought into focus at a short distance in the TELE state. Become.

With such a configuration, magnification adjustment and focus adjustment are performed only by rotating a single zoom ring.

The lens barrel disclosed in Japanese Unexamined Patent Publication No. 10-282933 is disclosed in Japanese Examined Patent Publication No. 6-100707 and Japanese Unexamined Patent Publication No. 9-8.
The magnification switching mechanism described in Japanese Patent No. 0291 is used, and at the time of shooting, a three-stage cylinder is extended from the camera body. The first step is feeding by a helicoid screw, the second step is feeding by a linear cam having a single feeding amount, and the third step is described in JP-B-6-100707 and JP-A-9-80291. The feeding is performed by the cam having the shape as described above.

Conventionally, as a compact camera using a single-focus lens in a photographing optical system, it is possible to obtain almost the same effect as in zoom photographing.
So-called pseudo zoom cameras have been proposed. Also, even in a compact camera that uses a zoom lens,
Cameras that use pseudo-zoom at the telephoto end have been proposed to obtain higher magnification photographs.

In these pseudo-zoom cameras, when the range to be photographed is determined, the display or signal for designating the portion corresponding to the range on the film is displayed on the film or the film cartridge in some form. It is added as trimming information, and when printing, not the entire frame of the film, but only the range specified by the trimming information is enlarged and printed, and the effect is as if a photograph was taken using a zoom lens. I can do things.

In the camera disclosed in Japanese Unexamined Patent Publication No. 11-242283, shooting is performed up to the tele end without using the pseudo zoom, and when shooting a photograph with a magnification beyond the telephoto end of the zoom lens, the pseudo zoom is used. There is shown a mechanism for performing pseudo-zooming in several steps by combining the trimming magnification and the focal lengths of a plurality of photographing lenses near the telephoto position. In addition, a method is shown in which the range to be printed on a photograph is accurately indicated even at the time of pseudo zoom by a combination of changing the shape of the cam groove of the lens barrel and the viewfinder and inserting and removing the converter lens in the viewfinder.

Particularly, in the camera capable of trimming described in Japanese Patent Laid-Open No. 07-175119, among the two groups,
A camera capable of performing continuous zooming by trimming in a bifocal lens that switches the focal length by inserting / removing the rear group to / from the optical axis is shown. Further, there is disclosed a method in which the driving of the zoom finder and the focus switching of the bifocal lens are performed without causing the photographer to feel uncomfortable.

As a zoom control method for a camera with pseudo zoom, in the camera capable of trimming photographing disclosed in Japanese Patent Laid-Open No. 04-361241, there is a pseudo focal length beyond the tele end, and the first telephoto side A method is disclosed in which the zoom operation is stopped at the tele end, and the zoom operation is performed again to enable zooming beyond the tele end to the pseudo focal length. Japanese Patent Laying-Open No. 2000-180945 also discloses a camera in which normal shooting is switched to pseudo mode when the zoom operation member is operated to the telephoto side for a certain period of time or more with the zoom lens at the telephoto end. JP 04-
In the camera capable of trimming photographing described in Japanese Patent No. 361242, there is disclosed a method in which when the camera is located at the telephoto end, it is possible to switch to pseudo zoom by pressing the zoom operation means for a long time. Japanese Patent Application Laid-Open No. 04-109739 discloses a camera capable of trimming shooting, which has a switching method including an operating member for switching between pseudo zoom and normal zoom, in addition to the zoom operating member.

[0013]

In a camera capable of selectively shooting discontinuous focal lengths, the focal lengths selectable by the photographer are discontinuous 4 to 6 types of focal lengths, and a focal point in between. The distance could not be selected.

Therefore, it is impossible to perform a fine zoom operation, which gives an uncomfortable feeling to a photographer observing the viewfinder, and it is impossible to perform fine zooming near a low magnification.

Further, when the pseudo zoom is used to zoom to a pseudo focal length beyond the telephoto end, the mechanism for linking the movement of the photographing lens and the change of the field of view of the finder is complicated and the cost is high.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a camera and an electronic camera which enable fine zooming without a sense of discomfort during zooming, have a small finder mechanism and are inexpensive.

[0017]

According to a first aspect of the present invention, a plurality of lens groups move in the optical axis direction with respect to an image plane,
A trimming magnification for the actual focal length of the photographing lens for adjusting the image magnification and for designating a photographing lens capable of photographing with a discontinuous focal length and a range to be printed on the image recording medium exposed through the photographing lens. And trimming information giving means for giving to the image recording medium at the time of photographing, and at least one pseudo focal length is provided between the discontinuous adjacent real focal lengths of the photographing lenses. And in optical equipment.

In the first invention, fine zooming and photographing can be performed.

A second aspect of the present invention is the first aspect of the present invention, wherein the taking lens has a plurality of lens groups, and each lens group draws a predetermined locus in the optical path with respect to the image plane. It is characterized in that the image magnification adjustment and the focus adjustment are alternately performed according to.

According to the second aspect of the invention, fine zooming and photographing can be performed even in a photographing lens which alternately performs image magnification adjustment and focus adjustment.

A third invention is characterized in that, in any one of the above inventions, a trimming magnification at each of the pseudo focal lengths is equal to or less than a ratio of adjacent real focal lengths.

In the third aspect of the invention, during zooming, the change in focal length monotonically increases / decreases, and zooming without discomfort is possible.

According to a fourth aspect of the invention, in the first or second aspect of the invention, n pseudo focal lengths are set between the adjacent real focal lengths, and the trimming magnifications are adjacent to each other. Approximately (1 / n + 1) times the ratio of the actual focal length, (2 / n +
1) Multiplier ... (n / n + 1) Multiplies.

According to the fourth aspect of the present invention, during zooming, the change in the screen area of the pseudo focal lengths between adjacent real focal lengths changes by the same factor, which enables smooth zooming.

A fifth aspect of the present invention is the first or second aspect of the invention, wherein n pseudo focal lengths are set between the adjacent real focal lengths, and the pseudo focal lengths are equal to each other. It is characterized in that it is a value obtained by equally dividing (n + 1) between adjacent real focal lengths.

According to the fifth aspect of the present invention, during zooming, the change in screen length between the pseudo focal lengths and the actual focal lengths before and after is changed by the same factor, so that a smooth zooming camera can be provided.

A sixth aspect of the invention is the first or second aspect of the invention, wherein one pseudo focal length is set between the adjacent real focal lengths, and the trimming magnifications are equal to the adjacent real focal lengths. It is characterized in that it is about (1/2) times the distance ratio.

According to the sixth aspect of the present invention, during zooming, the change in screen area between each pseudo focal length and the actual focal length before and after is changed by the same factor, which enables smooth zooming.

A seventh invention is any one of the above inventions, in which the screen type of the aspect ratio to be printed on the exposed image recording medium is the first screen which is the aperture fully open screen, and the aperture vertical size reduction screen. In order to specify any one of the three types of the two screens and the third screen which is the aperture left / right size reduction screen, a screen type assigning unit that assigns the screen type to the image recording medium at the time of shooting is provided, and each of the adjacent ones is provided. One pseudo focal length is set between the actual focal lengths, and each trimming magnification is a ratio of the first screen and the screens of the portions commonly used for the second and third screens. Is characterized by.

In the seventh invention, it is possible to switch the screen type and the pseudo focal length.

An eighth invention is the above-mentioned first to fifth inventions, in which the first actual focal length which is the widest focal length and the second actual focal length which is the next widen focal length. It is characterized by having the above pseudo focal length only between.

In the eighth aspect of the invention, zooming can be performed during the actual focal lengths where the actual focal length intervals tend to be the largest, and smooth zooming operation is possible.

A ninth aspect of the present invention has a plurality of lens groups, and each lens group draws a predetermined locus in the optical path with respect to the image plane, thereby performing image magnification adjustment and focus adjustment alternately. , A shooting lens capable of shooting with discontinuous focal lengths, and a trimming magnification with respect to the actual focal length of the shooting lens, in order to specify an image output range for the exposed portion exposed through the shooting lens A trimming information giving means which is given to the image recording medium at times, and each of the lens groups are provided with a predetermined locus in the optical path with respect to the image plane so that the image magnification adjustment and the focus adjustment of the photographing lens are alternately performed. An optical system having a first guide means for guiding by drawing and a second guide means for moving each of the lens groups to a pseudo focal length on an extension of the first guide means. In the equipment.

In the ninth invention, it is possible to continuously switch to the pseudo focal length of the focal length exceeding the actual focal length.

A tenth invention is the ninth invention, characterized in that the locus of the second guide means is a locus of a movement amount different from that of the first guide means.

In the tenth invention, the camera can be made compact.

An eleventh aspect of the present invention is the ninth or tenth aspect of the present invention, further comprising subject observation means for indicating a range to be photographed in association with driving of the photographing lens, wherein the lens group is the second.
When being guided by the guide means, the feature is that the photographing range of the pseudo focal length is switched to.

In the eleventh aspect, the subject can be reliably observed even at the pseudo focal length.

The twelfth invention is any of the above inventions,
The distance measuring means for measuring the distance to the object, the release means for exposing the image medium at the time of photographing, and the focal length designated by the zoom operating means for designating the photographing lens to an arbitrary focal length are In the case of the actual focal length, the first lens focusing control means for moving the taking lens to the focusing position obtained by the distance measuring means, and the focal length designated by the zoom operating means is the pseudo focal length. To
The photographing lens is characterized by including a second lens focusing control means for moving the lens to a focusing position obtained by the distance measuring means at the adjacent real angle on the wide angle side.

According to the twelfth aspect of the invention, since the image is taken with the smallest trimming magnification when the image is taken at the pseudo focal length, it is possible to take a picture with little deterioration in image quality.

According to a thirteenth aspect of the present invention, in any one of the above-mentioned inventions, the object observing means for indicating an area to be photographed in association with the driving of the photographic lens and the observable range of the object observing means can be changed. The observation range switching means is characterized by changing the observation range switching means to a narrower observation range in the case of the pseudo focal length than in the case of the actual focal length.

According to the thirteenth invention, the visual field range of the pseudo focal length can be shown by a simple mechanism.

According to a fourteenth invention, a plurality of lens groups move in an optical axis direction with respect to an image forming plane to adjust an image magnification, and a photographing lens capable of photographing with a discontinuous focal length, and the photographing lens described above. An electronic image pickup device for converting image formation into an electric signal, an image recording medium for recording an image obtained by the electronic image pickup device, and an electric signal from the electronic image pickup device for image processing and recording on an image recording medium. Image processing and recording means, electronic image display means for electrically displaying an image obtained by the electronic image pickup device, and the exposed electronic image pickup device, the range to be recorded on the image recording medium is designated. In order to achieve this, trimming information adding means for giving the image processing means a trimming magnification with respect to the actual focal length of the taking lens is provided, and the taking lens has at least one between the adjacent actual focal lengths. There that provided the pseudo focal length of the optical apparatus characterized.

According to the fourteenth invention, fine zooming and photographing can be performed.

In a fifteenth aspect based on the fourteenth aspect, the taking lens has a plurality of lens groups, and each lens group draws a predetermined locus with respect to the image plane in the optical path. It is characterized in that the image magnification adjustment and the focus adjustment are alternately performed according to.

In the fifteenth invention, fine zooming and photographing can be performed even in a photographing lens which alternately performs image magnification adjustment and focus adjustment.

A sixteenth aspect of the present invention is a distance measuring means for measuring a distance to an object, a lens driving means for driving the photographing lens, a zoom operation means for designating the photographing lens to an arbitrary focal length, and photographing. At this time, when the release means for exposing the electronic image pickup device and the focal length instructed by the zoom operating means are pseudo focal lengths, the combination of the actual focal length on the wide-angle side adjacent to the pseudo focal lengths The image exposed on the electronic image pickup device is trimmed on the basis of the lens focus control unit that moves to the focus position and the trimming information adding unit, and the range that can be photographed by the electronic image display unit is set. And a subject observing means for displaying.

According to the sixteenth invention, when shooting is performed at the pseudo focal length, shooting is performed with the smallest trimming magnification. Therefore, it is possible to shoot a photograph with little deterioration in image quality and indicate the shooting range.

A seventeenth invention is the invention according to any one of the fourteenth to sixteenth inventions, wherein the print size input means for inputting a print size at the time of printing, the total number of the electronic image pickup devices and the print size are used for the trimming. Trimming magnification determining means for determining the magnification.

According to the seventeenth invention, a photograph can be obtained in which deterioration of the image quality is not a problem even when printing.

The eighteenth invention is the invention according to any one of the fourteenth to seventeenth inventions, wherein the trimming magnification is less than or equal to the ratio of the total number of the electronic image pickup devices to the area of the stretched size (square inch) × 300 × 300. It is characterized by

According to the eighteenth invention, a photograph can be obtained in which deterioration of the image quality is not a concern even when printing.

A nineteenth invention is the invention according to any one of the fourteenth to eighteenth inventions, wherein the first image quality recording setting means records an image in the same number as the total number of pixels of the electronic image pickup device, and the electronic image pickup device. Second image quality recording setting means for recording an image with a number of pixels smaller than the total number of pixels, and photographing prohibiting means for prohibiting photographing with the pseudo focal length when the first image quality recording setting means is selected, It is characterized by having.

In the nineteenth aspect, when high-quality photo shooting is set, the high-quality photo can be obtained by prohibiting trimming.

[0055]

BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) FIGS. 1 to 25
Shows Embodiment 1 of the present invention. 1 is an exploded perspective view of a lens barrel that is Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view showing a collapsed state of the lens barrel and a configuration of a control circuit, and FIG.
4 is a sectional view showing the lens barrel in a wide state, FIG. 4 is a sectional view showing the lens barrel in a telephoto state, FIG. 5 is a developed view of a fixed barrel, FIG. 6 is a developed view of a first straight guide barrel, and FIG. 7 is the second
FIG. 8 is an exploded view of the differential cam barrel, FIG. 8 is an explanatory view of a moving cam locus of each lens group of the second differential cam barrel, FIG. 9 is an exploded perspective view of the finder lens moving mechanism, and FIG. Drawing (zooming from sinking barrel to wide), Fig. 11 is a development view of the finder cam plate (focusing at wide), Fig. 12 is a development view of the finder cam plate (zooming from wide to Zp2), and Fig. 13 is a viewfinder cam. Fig. 14 is a development view of the plate (focusing at Zp2), Fig. 14 is a development view of the finder cam plate (zooming from Zp2 to Zp2 '), and Fig. 15 is a development view of the finder cam plate (Z
p2 'focusing), FIG. 16 is a development view of the finder cam plate (zooming from Zp2 to Zp1'),
17 is a development view of the finder cam plate (focusing at Zp1 '), FIG. 18 is a development view of the finder cam plate (zooming from Zp2 to tele), and FIG. 19 is a development view of the finder cam plate (telefocusing). , Fig. 2
0 is a development view of the second differential cam cylinder (zooming from the collapsing cylinder to the wide, focusing at the wide, wide to Zp2
(Zooming to, Focusing on Zp2), Fig. 21
Is a development view of the second differential cam cylinder (zooming from Zp2 to Zp2 ′, focusing at Zp2 ′), and FIG. 22 is a development view of the second differential cam cylinder (zooming from Zp2 to Zp1 ′, Zp1 ′. FIG. 23 is a development view of the second differential cam barrel (zooming from Zp2 to tele, focusing on tele), FIG. 24 is a flow chart of photographing in the first embodiment, and FIG. 25 is an embodiment. Already in 1
The flowcharts of one different photographing operation are shown, and the first embodiment will be described below based on these drawings.

(Explanation of Lens Barrel Mechanism) FIG. 1 shows the structure of a lens barrel of a camera according to the first embodiment of the present invention. This lens barrel is a three-stage collapsible lens barrel provided with two so-called differential cam barrels. 141 is the camera body (see FIG.
159) of the fixed cylinder. This fixed cylinder 14
A female helicoid 141 a is formed on the inner peripheral portion of the No. 1. Reference numeral 142 denotes a first differential cam cylinder, and a male helicoid shape and a gear shape are formed to overlap each other on a rear end outer peripheral portion 142a. Reference numeral 143 denotes an inner peripheral portion of the first differential cam cylinder 142, which is a first portion that is slidably retained only in the rotational direction.
A straight guide tube. The protruding portion 143c and the base portion 143d of the first rectilinear guide cylinder 143 are fitted in the rectilinear grooves 141d and 141e in the inner diameter portion of the fixed cylinder 141.

The long shaft gear 120 provided on the fixed barrel 141
When the rotational force from the motor 108 is applied to the first differential cam barrel 142 gear-coupled to the long-axis gear 120,
Due to the helicoid coupling of the fixed barrel 141 to the female helicoid, the fixed barrel 141 advances and retreats in the optical axis direction while rotating. At this time, since the rotation of the first straight guide cylinder 143 is restricted by the fixed cylinder 141, the first differential cam cylinder 14 is prevented.
It moves back and forth in the optical axis direction without rotating together with 2.

Reference numeral 149 is a first flare cutting plate for cutting harmful light outside the photographing optical path. An opening 149a for passing necessary photographing light is formed in the center of the inner peripheral portion of the first flare cutting plate 149, and further on the outer peripheral portion, a rear end flange portion 143a of the first straight guide cylinder 143 is formed. A plurality of engaging portions 1 that are engaged with the formed engaged portions (not shown)
49b is formed. With this configuration, the first flare cut plate 149 moves forward and backward in the optical axis direction integrally with the first straight guide cylinder 143.

Reference numeral 144 denotes a second differential cam cylinder incorporated in the inner diameter portion of the first rectilinear guide cylinder 143. The first differential cam cylinder 143b is formed in the inner diameter portion of the first rectilinear guide cylinder 143 and its cam groove. Due to the action of the drive pin 151 of the fitted second differential cam cylinder, the second differential cam cylinder advances and retreats in the optical axis direction at the same time as the rotation. A second straight guide cylinder 147 is provided on the inner peripheral portion of the second differential cam cylinder 144.
Are assembled so that they can rotate relative to each other.

A nut ring 146 is supported between the claw portion 147a of the second straight guide cylinder 147 and the rear end flange portion 147b so as to be relatively rotatable. When assembled, the second differential cam barrel drive pin 151 is screwed into the nut portion 146a formed on the outer diameter portion of the nut ring 146 through the opening 144a of the second differential cam barrel 144, and as a result, the second differential cam barrel is driven. The cam cylinder 144 and the second linear guide cylinder 147 rotate relative to each other, and the first differential cam cylinder 142 and the first linear guide cylinder 14 rotate.
It moves back and forth with respect to 3.

At this time, in addition, in the inner diameter portions of the second differential cam barrel 144 and the second rectilinear guide barrel 147, the three 1's provided outside the first group lens barrel 145 holding the first lens group 153. The group cam pin 145a is fitted into the second cam groove 144b formed in the inner diameter portion of the second differential cam barrel 144, and the three group lens holders 148 that hold the second lens group 152 are provided on the outside of the three group cam pins 145a. Second group cam pin 148
a is a third differential cam cylinder 144 formed in the inner diameter portion of the third
It is fitted in the cam groove 144c, and is driven and controlled to a predetermined position in the optical axis direction by the action of each cam pin and cam groove.

Reference numeral 150 is a second flare cut plate. The engaged portion 150a is provided on the outer periphery of the second flare cut plate 150.
The engaged portion 150a is engaged with the claw portion 147c formed on the rear end flange portion 147b of the second rectilinear guide cylinder 147, so that the second flare cut plate 150 moves in the second rectilinear direction. It moves back and forth in the optical axis direction together with the guide tube 147. At the center of the inner peripheral portion of the second flare cut plate 150, an opening 150e for passing necessary photographing light is formed.

(Description of Structure of Viewfinder Lens Moving Mechanism) First, the lens barrel portion related to the finder drive will be described in more detail. In FIGS. 1 and 9, the fixed cylinder 141 is a female helicoid 1 on the inner circumference of the cylinder.
41a, and a fixing flange portion 141b on the outer periphery. Further, the side surface thereof has a hole 141c. Further, a plurality of key grooves 141d are provided on the inner circumference.

The first differential cam barrel 142 has a rear end outer peripheral portion 142 formed by overlapping a male helicoid and a gear shape.
The rear end outer peripheral portion 142a is in a helicoid fit with the female helicoid 141a of the fixed barrel 141, and is meshed with the long shaft gear 120 through the hole 141c of the fixed barrel.

With the above configuration, when the long shaft gear 120 rotates, the first rectilinear guide cylinder 143 rotates and extends in the optical axis direction with respect to the fixed cylinder 141.

Further, on the inner circumference of the first differential cam barrel 142,
A first straight guide cylinder 143, which is rotatably fitted to this and fixed so as not to slip out in the optical axis direction, is housed. At the end of the first straight guide cylinder 143, the fixed cylinder 141 is attached.
Keys 143c that fit and slide with the key groove 141d of
Are formed. Therefore, when the first differential cam cylinder 142 is rotated and fed out to the fixed cylinder 141, the first straight guide cylinder 143 is fixed to the fixed cylinder 141 without rotating integrally with the first differential cam cylinder 142. In contrast, it extends in the optical axis direction.

A table 143d is formed on the upper side of the end in the optical axis direction of the first rectilinear guide cylinder 143.
A cylindrical pin portion 143e is formed on the upper surface of 3d. The base portion 143d is fitted in a groove portion 141e formed in an upper portion of the fixed barrel 141 so as to extend in the optical axis direction, and moves back and forth in the optical axis direction according to a zoom operation of the lens barrel.

Since the position of the pin portion 143e corresponds to the positions of the first group lens barrel 145 and the second group lens holder 148 which hold the photographing lens group, the pin portion 143e is formed.
The focal length of the taking lens can be known by detecting the position of.

Next, a viewfinder optical system that performs a zooming operation in conjunction with the zooming operation of the taking lens will be described with reference to FIG.

A finder cam plate 210 is provided above the fixed barrel 141 of the lens barrel, and the finder cam plate 210 is formed on the outer periphery of the fixed barrel 141 so as to extend in the optical axis direction. The position is regulated by 141f and the opposing flange portions 141b and 141g formed in the outer peripheral direction, so that it is movable only in the circumferential direction.

Further, the finder cam plate 210 is further pressed by the finder base plate 211 from above. The objective lens frames 214 and 215 holding the finder objective lens groups 212 and 213 have holes 214a,
215a are formed in the holes 214a, 21
A finder guide bar 216 penetrates through 5a. The finder guide bar 216 is mounted in a hole portion 211a formed at the front end of the finder base plate 211 and guides the finder objective lens groups 212 and 213 (lens frames 214 and 215) back and forth in the optical axis direction.

In order to prevent the objective lens frames 214, 215 from rotating, the dowels 214b, 215b formed on the objective lens frames 214, 215 are formed on the finder base plate 2211 so as to extend in the optical axis direction. Is fitted to.

On the back side of the finder cam base plate 210 (the side facing the fixed barrel 141), the first cam groove 210 is formed.
a is formed in the first cam groove 210a.
The pin portion 143e of the linear guide cylinder 143 is fitted.

Further, the finder cam plate 210 has
Second and third cam grooves 210b and 210c are formed, and these second and third cam grooves 210b and 210c are formed.
Are the dowel parts 214c, 2 of the objective lens frames 214, 215.
15c is fitted. Note that the viewfinder base plate 211
A long groove (not shown) into which the dowel parts 211c and 215c are inserted is formed along the optical axis direction.

Here, the finder cam plate 21 is shown in FIG.
The cam grooves 210a, 210b, 210c of No. 0 are shown in a developed form. Although the cam groove 210a is on the back side in the figure,
It is indicated by a solid line for explanation. The pin portion 143e comes off from the first cam groove 210a when the lens barrel is retracted and retracted (at a position indicated by "A" in the drawing). Also, at the wide end, the first
The cam groove 210a is inserted up to the position indicated by the circled "W" in the figure. At this time, the respective dowel parts 214c and 215c are in the positions indicated by "W" in the drawing within the second and third cam grooves 210b and 210c. When retracted, dowel part 214
c and 215c move from the position indicated by "circle" in the circle to the position indicated by "W".

When the taking lens is extended, the cam plate 21
0 moves to the left in FIG. 10 with respect to the dowels 214c and 215c, and the pin portion 143e and the dowels 214c and 2c at the tele end.
15c is a circled "T" with respect to the cam plate 210 in the figure.
Move to the position indicated by. Therefore, the finder lens frames 214 and 215 are guided by the cam grooves 210b and 210c and move in the optical axis direction.

According to this structure, the pin portion 143e, which interlocks the first rectilinear guide cylinder 143 and the finder cam plate 210 during the collapsing, is disengaged from the cam plate 210a, and the cam plate 210 moves in the circumferential direction. Therefore, as shown in FIG. 9, a cam plate fixing spring 217 is provided to fix the cam plate 210. Specifically, the protrusion 217 a of the fixed spring 217 is attached to the cam plate 210.
Engages with a V groove 210e formed on the end surface 210d of the
The cam plate 210 is held between the retracted position and the wide position. Also,
Between the wide end and the tele end, the end face 210 of the cam plate 210
The d and the cam fixing spring 217 come into contact with each other, and a frictional force acts between them.

The light flux that has passed through the finder objective lens that has undergone the variable power operation as described above passes through the triangular prism 218 and then forms an image on the finder information display section 308 between the triangular prism 218 and the roof prism 219. Therefore, the finder image can be viewed through the roof prism 219 and the eyepiece lens 220.

(Explanation of actual focal length and pseudo focal length) FIG. 4
As shown in FIG. 2 and FIG. 20, in the camera of the first embodiment, the actual focal length capable of zooming movement with the taking lens is 35 mm wide, 50 mm Zp1, 70 m Zp2.
m, Zp3 105mm, Tele 150mm.
There are two pseudo focal lengths, W '= 40mm and W''= 45mm between wide and Zp1, and Z between Zp1 and Zp2.
There is p1 '= 60mm, and Zp2' between Zp2 and Zp3
= 85mm, Zp3 '= 12 between Zp3 and Zp4
There is 5mm. (Description of operation of lens barrel) First, a retracted state (see FIG. 2) in which a camera is not used will be described. The first differential cam barrel 142, which is connected to the fixed barrel 141 and the helicoid, is not yet extended from the front surface of the fixed barrel 141. Second
The drive pin 151 of the differential cam barrel 144 is one of the first cam grooves 143b formed in the inner diameter portion of the first rectilinear guide barrel 143.
43b1 part (FIG. 7, FIG. 8) is inserted. The three first group cam pins 145a provided on the outer side of the first group lens barrel 145 holding the first lens group are provided with the second differential cam barrel 144.
144b1 of the second cam groove 144b formed in the inner diameter portion of the
The first lens group lens barrel 145 has not yet been extended with respect to the second differential cam barrel 144. The three second group cam pins 148a provided on the outer side of the second group lens holder 148 holding the second lens group 152 have three third cam grooves 144c formed in the inner diameter portion of the second differential cam barrel 144.
It is fitted in the portion 44c1 (FIGS. 7 and 8). From the above,
When retracted, the first group lens barrel 145 is not extended from the fixed barrel 141.

In FIG. 2, the male helicoid and the gear are formed on the rear end outer peripheral portion 142a of the first differential cam barrel 142 so as to overlap with each other, and mesh with the long shaft gear 120. It is connected to the motor 108 through a gear train including 121.

Reference numeral 109 is a four propeller-shaped pulse plate, 122 is a PI (photo interrupter) for detecting passage of the propeller of the pulse plate, and 110 is its pulse detection circuit.

Reference numeral 111 denotes a motor control circuit, which is constructed so that the output of the comparator 112a forms a motor forward rotation energizing circuit and the output of the comparator 112b forms a motor reverse rotation energizing circuit.

Reference numeral 130 denotes a release button, which transmits to the zooming signal processing circuit 115 the status signals of the first stroke and the second stroke of the release button. Reference numeral 113 denotes a microcomputer, which performs calculations for rotating the first differential cam barrel as shown in FIG. 42, based on signals from the object distance detection circuit 114 and the zooming signal processing circuit 115. Reference numeral 116 is a logic control circuit, and when the photographer presses the first stroke of the release button, the circuit for normal rotation of the motor of the motor control circuit 111 is made ready for operation. When the release button operation is cut off, the logic control circuit 116 puts the motor reversing circuit of the motor control circuit 111 into a work ready state.

The subject distance detection circuit 114 digitizes the subject distance information obtained from the distance measuring module 117 and inputs it to the microcomputer 113.

Reference numeral 118 is a zooming operation member for changing the magnification between f = 35 mm and 150 mm, for example. The zooming signal processing circuit 115 processes the time during which the zooming operation member is pressed, and the processing circuit 115 outputs the position signal. It is digitized into 0 to 50 as shown in FIG. 42 and input to the microcomputer 113.

When the photographer presses the release button up to the first stroke to turn on the power switch, the logic control circuit 116 issues a start signal to the distance measuring module 117, and the time required for the distance measuring operation to be sufficiently completed. After that, a motor start signal is issued to the motor control circuit 111.

Further, the microcomputer 113 controls the finder display control means 302.

This camera selects the standard screen (aperture fully open screen), panorama screen (aperture vertical dimension reduction screen), classic screen ( Aperture left / right size reduction screen) can be photographed, and at the time of printing, the microcomputer 113 is provided with a magnetic recording means 303 for magnetically recording the photographed screen type on a film so that the photographed screen type can be trimmed and printed.
Is in control.

Further, the magnetic recording means 303 also writes the trimming magnification at the time of photographing at the pseudo focal length in the magnetic recording layer of the film.

Here, in the present specification, "actual focal length" is the focal length of the photographing lens at the time of photographing, "trimming magnification".
Is the ratio of the display range or the print range to the maximum image that can be recorded on the image recording medium, and the "pseudo focal length" is the product of the focal length value of the taking lens and the trimming magnification value at the time of shooting. Indicates the value.

(Explanation of the operation from the retracted state to the wide state) Next, the operation from the retracted state of FIG. 2 to the wide standby state of FIG. 3 will be described.

When the user turns on the switch (not shown) of the camera, the motor 108 is attached to the first differential cam barrel 142.
Is applied to the first differential cam barrel 142 by the helicoid coupling with the female helicoid of the fixed barrel 141, and the first differential cam barrel 142 is extended in the optical axis direction while rotating.
The drive pin 151 of the differential cam barrel 144 is as shown in FIG.
After first moving from the 143b1 part to the 143b5 part of the first cam groove 143b, it continuously returns to the 143b2 part,
The second differential cam cylinder 144 is extended with respect to the linear guide cylinder 143 by an amount corresponding to the optical axis direction of the 143b1 portion and the 143b2 portion of the cam.

First group cam pin 14 of first group lens barrel 145
In FIG. 8, reference numeral 5a denotes 144b of the second cam groove 144b.
After moving once from 1st copy to 144b5th copy,
4b2, and the first group lens barrel 145 with respect to the second differential cam barrel 144 has the cams 144b1 and 144b.
It is paid out by the amount of two parts in the optical axis direction.

The second group cam pin 148a of the second group lens holder 148 is located at the first portion 144c1 of the third cam groove 144c.
The second lens group 152 moves to the portion 44c2 of the second differential cam barrel 144, and the second lens group 152 moves to the portion 144c1 of the cam 14 and
4c2 part is retracted by the amount in the optical axis direction. By the above-mentioned feeding, the feeding is performed to the wide standby state shown in FIG.

When the lens barrel is in the wide state shown in FIG. 3, the second flare cut plate 150 is pushed to the film side by the second lens 152, and the engaged portion 150a is the claw portion of the second linear guide cylinder 147. The spring portion 1 remains locked to 147c.
The elasticity of 50b moves the opening 150e to the film side.

The outline of the movement of the lens group when changing from the retracted state to the wide standby state will be described again with reference to FIG. In FIG. 20, the first group cam pin 145a that moves the first lens group is fitted in the second cam groove 144b, and the second group cam pin 148a that moves the second lens group is fitted in the third cam groove 144c. In the collapsed state, the first-group cam pin 145a and the second-group cam pin 148a are on the broken line at the A position, and the forward rotation of the motor 108 causes the motor to stop / reverse at the C position after passing the B position and stop at the D position. This D position is the wide standby position of the camera.

Regarding the movement of the finder lens moving mechanism when changing from the retracted state to the wide standby state,
This will be described with reference to FIG.

In FIG. 10, the forward rotation of the motor 108 causes the pin portion 143e of the first rectilinear guide cylinder 143 to move.
It is extended from the A position of the collapse to the subject side, and at the B position the first
It contacts the front end 210a1 of the cam groove. Further, the forward rotation of the motor causes the pin portion 143e to rotate the first cam plate to the left, and temporarily stops the motor at the C position. Due to the rotation of the cam plate at this time, the dowels 214c and 215c of the objective lens frame of the finder are moved from the sinking position to the wide position in the figure, and the finder enters the wide state.

In FIG. 10, for convenience, the relative movement of the pin portion 143e and the dowel portions 214c and 215c is shown with reference to the finder cam plate 210, but in reality, the pin portion 143e and the dowel portions 214c and 215c are shown. Only moves in the direction of the optical axis, and the finder cam plate 210 rotates around the optical axis. Therefore, the finder cam moves to the left on this page.

Subsequently, the motor 108 is rotated in the reverse direction, and the pin portion 143e is pulled into the D position and stopped. When moving from C to D, the viewfinder dowels 214c and 21c
5c does not move, so the viewfinder magnification does not change.

(Shooting in wide state) In this state, when the photographer pushes the release button 130 up to the first stroke,
First, the distance measuring module 117 performs the distance measuring operation with the signal of the logic control circuit 116, and the signal is sent to the object distance detecting circuit 114 to be digitized.
Sent to 3. The digital signal indicating the focal length at the time of shooting is output from the zooming signal processing circuit 115 as the microcomputer 1
13 added. This arithmetic circuit 113 includes circuits 114 and 11
According to the output of 5, the operation as shown in FIG. 42 is performed. For example, when the subject distance is 4 m, the zooming operation means 1
Assuming that the switching position of 18 is a wide position of f = 35 mm, the number of both is combined and the number of 11 is stored as shown in FIG. 42.
This is used as a reference value for the comparator 12a.

The motor control circuit 111 receives the signal from the logic control circuit 116 and the motor 1
08 normal rotation, the first differential cam barrel 142 TELE from WIDE
Rotate in the direction. The rotation of the motor 108 is pulsed and output by the pulse plate 109, detected by the pulse detection circuit 110, and applied to the comparator 112.

Position signals are sequentially issued by the forward rotation of the motor 108, and the comparator 112a that counts the number of pulses is eventually inverted to issue an end signal, and the motor control circuit 111 short-circuits both ends of the motor 108 to cause the motor to move. Apply an electric brake to 108 and stop.

As a result, the first differential cam barrel 142 is further extended by the helicoid, and in FIG.
The drive pin 151 of the differential cam cylinder stops at an arbitrary position between the 143b3 part (infinite position) and the 143b4 part (closest position) of the first cam groove 143b according to the rotation amount of the motor.

In FIG. 8, the first group lens barrel 145-1
The group cam pin 145a is provided on the second cam groove 144b at 144b.
The third group moves to an arbitrary position between the 144b4 section and the second group cam pin 148a of the second lens holder 148 moves to an arbitrary position between the 144c3 section and the 144c4 section of the third cam groove 144c. By the above-mentioned extension, the first lens groups 153 and 2 fixed to the first group lens barrel 145
The second lens group 152 fixed to the group lens holder 148 moves, and focus adjustment is performed according to the subject from infinity to the closest distance.

After that, when the photographer pushes the release button to the second stroke, the well-known exposure operation is performed and the release button is restored. Then, the motor 108 is instructed by the logic control circuit 116 and the motor control circuit 1
11 and the first differential cam cylinder 242 is WIDE.
When it rotates in the direction and returns to the initial position, the comparator 112b reverses and the motor 108 stops. Then, the film is wound up by one frame by a known winding means, and it is in the state before pressing the release button again.

In the above embodiment, 5 points are switched between 35 mm and 150 mm, but the same operation can be performed by increasing or decreasing the number of points.

(In FIG. 20, the outline of the movement of the lens group for wide-angle shooting will be described once more.) In the above embodiment, the pulse plate 109 and the pulse detection circuit 110 are provided to detect the position of the shooting lens. Although the stop timing of the motor 108 is determined, the present invention is not limited to this. A pulse motor is used as the motor 108, and the pulse motor is rotated according to the number of output pulses from the arithmetic circuit 113. The position of the taking lens may be decided. With this configuration, the pulse plate 109, the pulse detection circuit 110, and the comparator 112a are not necessary, and the output of the arithmetic circuit 113 is output to the motor control circuit 111.
It is good if you input it directly to.

In FIG. 20, in the wide standby mode, the first group cam pins 145a and the second group cam pins 148a on the second differential cam barrel 144 are on the broken line at the D position. When the release button is pushed to the first stroke, the first-group cam pin 145a and the second-group cam pin 148a move to the position indicated by the alternate long and short dash line at the E position, and stop. Next, when the release button is pressed to the second stroke, a known exposure operation is performed, and the motor 108 is rotated in the reverse direction to return to the D position and stop.

The movement of the finder lens moving mechanism during the photographing operation in this wide state will be described with reference to FIG. In FIG. 11, when the release button is pressed to the first stroke, the pin 108 143e of the first straight guide cylinder 143 is extended from the wide D position to the object side by the forward rotation of the motor 108 and stopped at the E position. At this time,
The pin portion 143e has a front edge 210a of the first cam groove 210a.
1 and the trailing edge 210a2, the finder cam plate 210 does not rotate and the dowel portion 21 of the objective lens 21 is not rotated.
Since the 4c and 215c also do not move in the optical axis direction, the magnification of the finder does not change. Next, when the release button is pressed to the second stroke, the known exposure operation is performed, and the motor 1
The pin portion 143e is retracted from the E position to the D position by the reverse rotation of 08. At this time, since the finder cam plate 210 does not rotate, the magnification of the finder does not change.

(From the actual wide focal length to the actual focal length Zp2
20. When the taking lens is in the wide position, the photographer continues to press the zooming operation member of the camera for a certain time, and the zooming signal processing circuit determines the zoom position to be Zp2, in FIG. The positive rotation of the motor 108 causes the first group cam pin 145a for moving the first lens group and the second group cam pin 148a for moving the second lens group to pass through the points C and G from the dashed line at the point D and stop at the point F. Then, the motor is rotated in the reverse direction and stopped in the second cam groove 144b and the third cam groove 144c on the broken line at point G.

The movement of the finder lens moving mechanism during this operation is as shown in FIG. 12, in which the pin portion 143e of the first rectilinear guide barrel 143 is extended from the wide D position to C
It contacts the front edge 210a1 of the first cam groove at the position, stops at the F position while rotating the finder cam plate 210, and then is retracted to the G position by the reverse rotation of the motor 108. Due to the rotation of the finder cam plate 210, the dowels 214c and 215c of the objective lens are moved from wide to Zp2.
, And the magnification of the finder becomes the value of Zp2.

Next, the photographer releases the release button 13 of the camera.
When 0 is pressed and a shooting operation is performed, the camera adjusts the focus according to the distance to the subject, and thus the first differential cam barrel 142 is used.
The rotational force from the motor 108 is applied to the first group cam pin 145a of the first group lens barrel 145 in FIG.
Moves from the G position of the second cam groove 144b to the H position,
The second group cam pin 148a of the second group lens holder 148 is
The third cam groove 144c moves from the G position to the H position. By the above-mentioned extension, the first lens group 153 and the second group lens holder 148 fixed to the first group lens barrel 145.
The second lens group 152 fixed to the camera moves, the focus is adjusted, the shutter (not shown) is opened and closed, the motor 108 is rotated in the reverse direction, and the lens barrel is retracted to the G position. ) Is rolled up.

The movement of the finder lens moving mechanism during this photographing operation is as shown in FIG.
The pin portion 143e of No. 3 is extended in the optical axis direction from the G position of Zp2 to the H position, but the front edge 21 of the first cam groove 210a is extended.
Since 0a1 is not reached, the viewfinder cam plate 210 remains stationary. Therefore, the dowel part 21 of the objective lens
4c and 215c remain at the Zp2 position, and the viewfinder magnification does not change.

(From the actual focal length Zp2 to the pseudo focal length Zp
Explanation of zooming up to 2'and shooting)
At the p2 position, the photographer continues to push the zooming operation member of the camera in the Tele direction for 0.2 seconds, and when the zooming signal processing circuit determines the zoom position to be Zp2 ', in FIG. Causes the first lens group cam pins 145a and 2 to move the first lens group.
The group cam pin 148a passes through the point I from the dashed line at the point G and stops at the point J.

The movement of the finder lens moving mechanism during this operation is as shown in FIG. 14, in which the pin portion 143e of the first rectilinear guide cylinder 143 is extended from the G position of Zp2 and the front edge 210a1 of the first cam groove at the I position. And stops at the J position while rotating the finder cam plate 210. Due to the rotation of the finder cam plate 210, the dowel portions 214c and 215c of the objective lens move from Zp2 to Zp2 ', and the finder magnification becomes the value of Zp2'.

Next, the photographer releases the release button 13 of the camera.
When 0 is pressed and a shooting operation is performed, the camera adjusts the focus according to the distance to the subject, and thus the first differential cam barrel 142 is used.
The rotational force from the motor 108 is applied to the first group cam pin 145a of the first group lens barrel 145 and the second group cam pin 148a of the second group lens holder 148 in FIG.
The cam groove is temporarily moved from the G position to the J position and is then extended to the L position.

By the above extension, the first group lens barrel 1
The first lens group 153 fixed to 45 and the second lens group 152 fixed to the second group lens holder 148 move, focus adjustment is performed according to the subject distance, and opening / closing of a shutter (not shown) is performed. Is performed again, the motor 10
8 rotation, the first group cam pin 145a of the first group lens barrel 145 and the second group cam pin 1 of the second group lens holder 148 are rotated.
48a stops moving to the J position. Then, the film (not shown) is rolled up, and the trimming magnification is recorded on the magnetic layer of the film.

The movement of the finder lens moving mechanism during this photographing operation is as shown in FIG.
The pin portion 143e of No. 3 is retracted from the J position of Zp2 ′ and contacts the trailing edge 210a2 of the first cam groove at the K position,
While rotating the finder cam plate 210, the motor is reversely rotated at the G position, and is extended to the L position and stopped. The shutter is opened and closed at this position, and the motor is further rotated to contact the front edge 210a1 of the first cam groove at the I position,
Stop at the J position while rotating the finder cam plate 210 in the reverse direction. By the reciprocating rotation of the finder cam plate 210, the dowel parts 214c and 215c of the objective lens are moved to Zp.
It moves back and forth between 2'and Zp2, and the magnification of the finder slightly changes.

(From the actual focal length Zp2 to the pseudo focal length Zp
Explanation of zooming and shooting up to 1 ')
At the p2 position, the photographer continues to push the zooming operation member of the camera in the wide direction for 0.18 seconds, and when the zooming signal processing circuit determines the zoom position to be Zp1 ', in FIG. Causes the first lens group cam pins 145a and 2 to move the first lens group.
The group cam pin 148a stops at the point M from the dashed line at the point G.

The movement of the finder lens moving mechanism during this operation is as shown in FIG. 16, in which the pin portion 143e of the first rectilinear guide cylinder 143 is brought into contact with the front edge of the first cam groove from the G position of Zp2. , Viewfinder cam plate 21
Stop at M position while rotating 0. By rotating the finder cam plate 210, the dowel 21 of the objective lens is rotated.
4c and 215c move from Zp2 to Zp1 ', and the viewfinder magnification becomes the value of Zp1'.

Next, the photographer releases the release button 13 of the camera.
When 0 is pressed and a shooting operation is performed, the camera adjusts the focus according to the distance to the subject, and thus the first differential cam barrel 142 is used.
The rotational force from the motor 108 is applied to the first group cam pin 145a of the first group lens barrel 145 and the second group cam pin 148a of the second group lens holder 148 in FIG.
The cam groove is temporarily moved from the M position to the N position, and is extended to the P position and stopped. By the above-mentioned extension, the first lens group 153 fixed to the first group lens barrel 145 and the second lens group 152 fixed to the second group lens holder 148 move, and focus adjustment is performed according to the subject distance. Then, the shutter (not shown) is opened and closed, and the motor 108 is rotated again, so that the first group lens barrel 145 1
The group cam pin 145a and the second group cam pin 148a of the second group lens holder 148 stop moving to the R position. afterwards,
The film (not shown) is rolled up and the trimming magnification is recorded on the magnetic layer of the film.

The movement of the finder lens moving mechanism during this photographing operation is as shown in FIG.
The pin portion 143e of 3 contacts the rear edge 210a2 of the first cam groove from the M position of Zp1 'and is retracted while rotating the finder cam plate 210, reversing the motor at the N position and reaching the P position. Stop feeding. The shutter is opened and closed at this position, and the motor is further rotated to contact the front edge 210a1 of the first cam groove at the Q position,
The finder cam plate 210 is rotated in the reverse direction and stopped at the R position. By the reciprocating rotation of the finder cam plate 210, the dowel parts 214c and 215c of the objective lens are moved to Zp.
The lens moves back and forth between 1'and Zp1, and the magnification of the finder slightly changes.

(Explanation of Zooming and Shooting from Real Focal Length Zp2 to Real Focal Length Tele) The taking lens is at the Zp2 position, and the photographer sets the zooming operation member of the camera to Tele.
The time interval when the zooming signal processing circuit pushes the zooming operation member for a certain time in the direction is the time interval at which the zooming operation member stops at the pseudo focal length Zp3 ', but the time interval is 0.3.
Since it is more than a second, stop at the pseudo focal length is prohibited, and it is determined to stop at the next real focal length Tele.

Then, in FIG. 23, the motor 108
The first group cam pin 145a and the second group cam pin 148a, which move the first lens group by the positive rotation of, pass from the dotted line at the point G to the point I / T, stop at the point S, and then reverse the motor to move to the point T. It stops in the second cam groove 144b and the third cam groove 144c on the broken line at the point.

In the movement of the finder lens moving mechanism during this operation, the pin portion 143e of the first rectilinear guide cylinder 143 is extended from the G position of Zp2 in FIG.
At the position, the front edge 210a1 of the first cam groove is contacted, and the finder cam plate 210 is rotated, stopped at the S position, and then retracted to the T position. Due to the rotation of the finder cam plate 210, the dowel parts 214c and 215c of the objective lens are moved from Zp2 to Tele, and the magnification of the finder becomes the value of Tele.

Next, the photographer releases the release button 13 of the camera.
When 0 is pressed and a shooting operation is performed, the camera adjusts the focus according to the distance to the subject, and thus the first differential cam barrel 142 is used.
The rotational force from the motor 108 is applied to the first group cam pin 145a of the first group lens barrel 145 in FIG.
Moves from the T position of the second cam groove 144b to the U position,
The second group cam pin 148a of the second group lens holder 148 is
The third cam groove 144c moves from the T position to the U position. By the above-mentioned extension, the first lens group 153 fixed to the first group lens barrel 145 and the second lens group 152 fixed to the second group lens holder 148 move, and focus adjustment is performed according to the subject distance. Done, shutter (not shown)
Is opened and closed, the motor 108 is rotated in the reverse direction, and the lens barrel is opened.
The film (not shown) is rolled up to the T position and wound up.

The movement of the finder lens moving mechanism during this photographing operation is as shown in FIG.
Although the third pin portion 143e is extended in the optical axis direction from the T position of Zp2 to the U position, the front edge 210 of the first cam groove 210a is extended.
The finder cam plate 210 remains stationary because it does not reach a1. Therefore, the dowel part 214 of the objective lens
c and 215c remain in the Tele position, and the viewfinder magnification does not change.

(Explanation of Zooming Using Flowchart) A flow for selectively zooming the actual focal length and the pseudo focal length will be described with reference to the flowchart of FIG.

When the photographer operates the zoom operating member 118, the zooming signal processing circuit 1 is executed in steps S2 to S4.
The direction of zooming is measured at 15 and the motor 108 for driving the lens barrel is started to rotate. During this time, the time during which the zoom button is pressed by the zooming signal processing circuit 115 is measured,
If the ON time of the zoom operation member is less than 0.3 seconds in the flow S5, the zooming member stops at the pseudo focal length or the actual focal length adjacent to the focal length before the start of zooming. If it is 0.3 seconds or more, the stop to all pseudo focal lengths is prohibited in the flow S8, and when the zoom operation member is turned OFF, the flow S
At 10, the motor is stopped at the closest actual focal length in the driving direction. If the first step of the release button is turned on in flow 7, the number of rotation pulses of the motor is determined in steps S11 to 13, and if the second step of the release button is turned on in step S14, steps S15 to 18 are performed. Move the taking lens to open and close the shutter. In flow S19,
Record the trimming ratio on the magnetic layer of the film, and use the flow S
It ends at 21. If this trimming magnification information is read at the time of printing and trimming printing is performed, a photograph equivalent to that taken at that focal length can be obtained.

Further, using the flowchart of FIG. 25,
A flow for selectively zooming the actual focal length and the pseudo focal length by a method different from FIG. 24 will be described.

The difference from FIG. 24 is that in step S5, if the difference (= interval time) between the time when the previous zoom operating member was operated and the time when this zoom operating member was operated is less than 1.2 seconds, the flow proceeds to step S6a. Go ahead and allow the motor to stop at the pseudo focal length. When the interval time in the flow S5 is S1.2 seconds or more, the stop of all pseudo focal lengths is permitted. In flow S7, when the zoom operation member is turned off, in step S8 the motor is stopped at the closest actual focal length in the driving direction. In Flow S-9, the measurement of the zoom operation interval time is started in preparation for the next operation of the zoom operation member. In addition, after the flow S9, S7 of FIG.
The flow is the same as the subsequent steps.

(Characteristics of this Embodiment 1) A plurality of lens groups are provided, and each lens group draws a predetermined locus in the optical path with respect to the image plane, thereby adjusting the image magnification and the focus. In a camera with a shooting lens that can perform shooting at discontinuous real focal lengths, a pseudo focal length is placed between the real focal lengths, so fine zooming and shooting are possible without adding a mechanical structure. Became.

Since two pseudo focal lengths are arranged between the wide and the next actual focal length Zp1, it is possible to perform particularly fine zooming and photographing during that period.

By controlling the drive of the motor 108, the photographer can confirm the photographing range at the pseudo focal length in advance without adding any mechanical structure to the photographing lens or the finder.

In the flow of FIG. 24, zooming to the adjacent pseudo focal length is possible only when the operating time of the summ operating member is less than 0.3 seconds. Therefore, pressing the zoom operating member for a short time means that Has a desire to perform subtle zooming, the camera judges and stops at the adjacent pseudo focal length. Pressing the zoom operation member for a long time determines that the photographer has the desire to perform large zooming, and the camera determines that it is not possible to stop the pseudo focal length in the middle, and it is possible to stop at the actual focal length. There is. As a result, there is a high possibility that a photograph can be taken at the actual focal length with high image quality as much as possible while enabling zooming that matches the will of the photographer.

In the flow of FIG. 25, if the difference (= interval time) between the time when the zoom operation member is operated last time and the time when the zoom operation member is operated this time is less than 1.2 seconds, the photographing at the pseudo focal length is permitted. Therefore, if the photographer frequently zooms, the camera determines that the photographer has the intention to perform delicate zooming, and the camera can stop at the pseudo focal length so that finer zooming can be performed. I am trying.

When the zooming interval is long, the camera determines that the photographer has the intention to perform new zooming, and the stop of the intermediate pseudo focal length is not permitted, and the actual focal length is disallowed. It is possible to stop at.

As a result, there is a high possibility that a photograph can be obtained at the actual focal length with high image quality as much as possible while allowing zooming according to the will of the photographer.

(Second Embodiment) FIGS. 26 to 32 show a second embodiment of the present invention.

(Description of lens barrel mechanism) The configuration of the lens barrel of the camera according to the second embodiment is the same as that of the first embodiment shown in FIGS. Therefore, the description is omitted.

(Explanation of Structure of Viewfinder Lens Moving Mechanism) The structure of the finder lens moving mechanism of the second embodiment is almost the same as that of the first embodiment shown in FIG. 9 except that the finder information display section 308 is different. , LCD
(Liquid crystal display), and its configuration is shown in FIG.
This will be described in (a).

The viewfinder display control means 302 is shown in FIG.
However, it is connected to the microcomputer 301 described above and controls the LCD driving means 304. The LCD drive means 304 is L
The display and non-display of the first shooting range mark 308a, the second shooting range mark 308b, and the third shooting range mark 308c, which are liquid crystal displays of the CD 308, are switched.

This camera selects the shooting screen type of the aspect ratio to be printed on the exposed film from the standard screen (aperture fully open screen), panorama screen (aperture vertical size reduction screen), and classic screen. (Aperture left / right size reduction screen), three types of shooting are possible, and the first shooting range mark 308a and the second shooting range mark 308a are used to switch the viewfinder field to these screen types.
Shooting range mark 308b, third shooting range mark 308c
There is.

First, when the photographer selects the photographing screen as the standard screen (aperture fully open screen), as shown in FIG. 26B, no photographing range mark is visible and the viewfinder field of view is standard. The screen (H) is displayed.

When the photographic screen is selected as the classic screen (aperture horizontal dimension reduction screen), the first photographic range mark 308a and the third photographic range mark 308c are displayed as shown in FIG. The transmittance of is reduced and the view of the viewfinder is made classic (C).

When the panorama screen (aperture vertical dimension reduction screen) is selected as the photographing screen, the second photographing range mark 308b and the third photographing range mark 308c are displayed as shown in FIG. Of the viewfinder is set to the panorama (P).

When the pseudo focal length is selected by zooming, all of the first photographing range mark 308a, the second photographing range mark 308b and the third photographing range mark 308c are displayed as shown in FIG. Shows the range to be photographed at the pseudo focal length.

(Explanation of Operation of Lens Barrel) Embodiment 1
Since it is the same as, the description will be omitted.

(Explanation of zooming operation from retracted state to wide state) Since it is the same as the first embodiment, the movement of the finder is shown in FIG. 10, and the movement of the photographing lens is shown in FIG. 31 by the first group cam pin 145a and the second group cam pin 148a. Movement track "A"
, And the description is omitted.

(Shooting in Wide-angle State) Since it is the same as that of the first embodiment, the movement of the finder is shown in FIG. 11 and the movement of the photographing lens is shown in the movement locus “B” in FIG. 31, and the description thereof is omitted.

(From the actual wide focal length to the actual focal length Zp2
(Explanation of zooming and photographing up to) Since it is the same as the first embodiment, FIGS. 12 and 13 are referred to, and movements of the photographing lens are referred to movement loci “C” and “D” in FIG. 31, and the explanation thereof is omitted.

(From the actual focal length Zp2 to the pseudo focal length Zp
Description of zooming and shooting up to 2 ') Unlike the first embodiment, during the zooming, the movement of the photographing lens is stopped as shown by the movement locus "E" in FIG. 31, and the viewfinder is also moved as shown in FIG. Absent. However, the LCD 308 of the finder changes as shown in FIG. 26E, and shows a range corresponding to the visual field of the pseudo focal length Zp2 '.

Next, when the photographing operation is performed by pressing the release button 130, the movement of the photographing lens is as shown in the movement locus "F" in FIG.
Moreover, it is rolled back to the original position. The viewfinder is shown in Fig. 28.
It doesn't move according to the street. The LCD 308 of the finder is shown in FIG.
It remains in the state of 6 (e).

(From the actual focal length Zp2 to the pseudo focal length Zp
(1) Description of zooming and shooting up to 1 ') Unlike the first embodiment, during zooming, the movement of the shooting lens is the position of the actual focal length Zp1 due to the rotation of the motor 108 as shown by the movement locus "G" in FIG. Move up to. The viewfinder also changes from the actual focal length Zp2 to the actual focal length Zp1 as shown in FIG.
D308 changes as shown in FIG. 26E, and indicates a range corresponding to the visual field of the pseudo focal length Zp1 ′.

Next, when the photographing operation is performed by pressing the release button 130, the movement of the photographing lens is as shown in the movement locus "H" in FIG.
Moreover, it is rolled back to the original position. The viewfinder is shown in Fig. 30.
It doesn't move according to the street. The LCD 308 of the finder is shown in FIG.
It remains in the state of 6 (e).

(Explanation of Zooming and Shooting from Real Focal Length Zp2 to Real Focal Length Tele) Since it is the same as the first embodiment,
The movement of the finder is shown in FIGS. 18 and 19, and the movement of the taking lens is shown in the movement loci “I” and “J” in FIG. 31, and the description thereof is omitted.

(Explanation of Zooming Using Flowchart) A flow for selectively zooming the actual focal length and the pseudo focal length will be described with reference to the flowchart of FIG.

When the photographer operates the zoom operating member 118, the zooming signal processing circuit 1 is executed in steps S2 to S4.
The direction of zooming is measured at 15 and the motor 108 for driving the lens barrel is started to rotate.

Further, in the flow S5, S6, S7,
When the type of screen to be printed is H size, it is possible to shoot at either the actual focal length or the pseudo focal length. When the screen type to be printed is C / P size, shooting at the pseudo focal length is prohibited.

If it is determined in step S8 that the switch of the zoom operating member 118 is OFF, then in step S9, the lens is stopped at the closest actual focal length in the current driving direction.

If the focal length designated by the zoom operating member 118 is the pseudo focal length in the flow S10, the flow S
At 11, the liquid crystal display of the finder is switched as shown in FIG. 26 (e), and the finder visual field is adjusted to the visual field of the pseudo focal length to be photographed. If the focal length designated by the zoom operation member 118 is the actual focal length in the flow S10, the liquid crystal display of the viewfinder is changed to C, H, or P in accordance with the screen type to be photographed in the flow S12. Switch to either.

If the first stage of the release button is turned on in flow S13, the number of rotation pulses of the motor is determined in flows S14 to S16, and the second release button is released in flow S17.
When the step is turned on, the photographing lens is moved in steps S18 to S21 to open and close the shutter. In step S22, a signal having both the screen type and the trimming magnification is recorded on the magnetic layer of the film.

With this combined use signal, one of C signal, H signal, and P signal is written as a signal of three kinds of screens, and both C signal and P signal are written at the time of trimming the pseudo focal length. Is.

Information on the screen type and trimming magnification is
If you read it at the time of printing and perform trimming printing, you can obtain a picture that is equivalent to that taken with that screen type and focal length.

(Characteristics of this Embodiment 2) The screen type of the aspect ratio to be printed on the exposed image recording medium is set to the standard screen (aperture fully open screen),
A panorama screen (aperture vertical size reduction screen) and a classic screen (aperture horizontal size reduction screen) can be selected, and the viewfinder switching mechanism of the camera that can switch the shooting range to the viewfinder Since it is also used to display the shooting range, without adding a new structure to the shooting lens or viewfinder,
The photographer can now confirm the shooting range in advance.

In printing, the pseudo focal length shooting is prohibited in the panoramic screen and the basic screen having a small screen area, and the shooting in the pseudo focal length having a small screen area is permitted only in the standard screen. It is possible to obtain a photograph in which the printed image quality does not deteriorate so much.

(Third Embodiment) FIGS. 33 to 36 show a third embodiment. FIG. 33A is a transverse sectional view of the electronic camera according to the third embodiment, and FIG. 33B is a rear view. FIG. 33
In (a), this electronic camera is roughly composed of a lens barrel portion 501 and a main body 500, and the lens barrel portion 501 is
A rotatably fixed cam barrel 503 is arranged inside the fixed barrel 502 fixed to the front surface of the main body. In the first lens group 504 which is a convex lens and the second lens group 505 which is a concave lens, the cam pins protruding from these lenses are fitted into the cam grooves formed in the fixed barrel 502 and the cam barrel 503 to rotate the cam barrel. This allows you to move back and forth in the optical axis direction,
Image magnification adjustment and focus adjustment are performed alternately. This cam shape is similar to the shape shown in the first and second embodiments.

A motor 510 for driving the cam barrel and a connecting gear 511 for transmitting the rotation of the motor to the cam barrel are arranged on the main body 500 side.

On the upper surface of the main body, a release button 512, on the rear surface of the main body, a zoom operation member 513 including a button for instructing to move the focal length of the lens to the telephoto side and a button for instructing to move to the wide-angle side, and a photographing operation A liquid crystal display plate 514 is arranged to show the subject to be photographed to the photographer. Inside the body, an electronic image pickup device 515 such as CCD or CMOS for converting an object image formed by the first lens group and the second lens group into an electric signal, a compact flash (registered trademark) card for recording an image, etc. The image recording medium 516 of FIG.

An image quality setting switch 520 is provided on the back surface of the main body 500, and a FINE (high image quality) mode for recording electric signals of all pixels of the electronic image pickup device 515 and an electronic image pickup device 5 are provided.
NORMAL (low image quality) that records some of the electrical signals of 15 pixels
The mode is switched to.

On the back surface of the main body 500, there is a print magnification setting switch 521, which is A4 size (about 210 * 29).
7)) A4 mode, which is set to print larger than size, and A5 mode, which is set to print smaller size than A4.

The microcomputer 517 arranged inside the main body is
When the zoom operation member 513 is operated, the operation signal is processed to control the rotation of the motor 510 to zoom the lens group to a predetermined focal length. During this zooming, the lens is stopped at the in-focus position due to the change in the blur amount of the image formed on the electronic image pickup device 515 (this is also a method called TV AF). When the release button 512 is pressed, a signal from the release button is received, an electric signal from the electronic image pickup device 515 is image-processed, and recorded on the image recording medium 516.

When the focal length selected by the zoom operating member 513 is the actual focal length, as shown in the rear view of FIG. 33B, the whole subject image formed on the electronic image pickup device 515. Are displayed on the liquid crystal display panel 514 by image processing of the microcomputer 517.

When the focal length selected by the zoom operating member 513 is the pseudo focal length, as shown in the rear view of FIG. 34, the entire subject image formed on the electronic image pickup device 515 is the microcomputer. The trimming magnification recorded in 517 is used to cut out an image showing a range to be photographed, and the image is displayed on the liquid crystal display plate 514.

As another example of the case where the focal length selected by the zoom operating member 513 is the pseudo focal length, FIG.
As shown in the rear view of FIG. 5, a solid line indicates a range of the whole subject image formed on the electronic image pickup device 515 and a trimming magnification recorded in the microcomputer 517, and a range not photographed. May be processed into an image with reduced contrast and displayed on the liquid crystal display plate 514.

(Explanation of Zooming Using Flowchart) A flow for selectively zooming the actual focal length and the pseudo focal length will be described with reference to the flowchart of FIG.

When the photographer operates the zoom operating member 118, the zooming signal processing circuit 1 is executed in steps S2 to S4.
The direction of zooming is measured at 15 and the motor 108 for driving the lens barrel is started to rotate.

When it is detected in step S5 that the operation of the zoom operating member is completed, in step S6 the motor is stopped at the next actual focal length in the current driving direction, and the zooming of the lens barrel itself is completed.

If the instruction of the zoom operation member is the pseudo focal length in the flow S7, according to the image quality mode set in advance by the image quality setting switch 520 on the rear surface of the camera in the flow S8,
When the low image quality (NORMAL) mode is selected in the flow S9, the flow S
Proceed to 12.

In steps S10 to S11, if A4 is set in advance by the print size setting switch 521 on the back surface of the camera, the trimming magnification automatically determined by the zoom operating member and the microcomputer is 1 to 1.3. Restrict to double the range. This electronic image sensor has an aspect ratio of A4.
The ratio is the same as that of paper, and the number of effective pixels is 15 million pixels. Further, in order to print a photograph on the entire surface of A4 paper at 300 pixels or more per inch, image data for 8.74 million pixels is required. From this, when the print size is designated as A4, high-quality printing can be achieved by setting the trimming magnification to 0.5 power of (15 million pixels / 8.74 million pixels) = 1.3 times or less.

Also, the print size setting switch 521
If A5 is set in, the trimming magnification automatically determined by the zoom operation member and the microcomputer is restricted to the range of 1 to 2 times. To print a photograph with 300 pixels or more per inch on the entire surface of A5 paper, image data for 4.37 million pixels is required. From this, when the print size is specified as A4, (15 million pixels / 43
(70,000 pixels) 0.5 to the power of 1.85 times or less will surely enable high-quality printing, but here, the trimming ratio of up to 2 times is perceived so that the deterioration of image quality is not noticed. is doing.

Then, in a flow S12, the liquid crystal display panel 51
4, the subject image obtained by the electronic image pickup device 515 is trimmed and displayed at the trimming magnification automatically determined by the zoom operation means.

If the determinations in steps S7 and S9 are NO, then in step S13, the subject image obtained by the electronic image pickup device 515 is displayed without trimming.

In Flow 14, the first button of the release button is O
If it becomes N, the number of rotation pulses of the motor is determined in steps S15 to 17, and if the second step of the release button is set to ON in step S18, the photographing lens is moved in steps S19 to 22 to open and close the shutter. To do.

In step S23, the image is recorded on the image recording medium 516 at the trimming magnification automatically determined by the zoom operating member and the microcomputer.

(Characteristics of Embodiment 3) In the electronic camera, a plurality of lens groups are provided, and each lens group draws a predetermined locus in the optical path with respect to the image plane, thereby forming an image. If you have a taking lens that can take images with discontinuous focal lengths by performing magnification adjustment and focus adjustment alternately, by providing a pseudo focal length between the actual focal lengths, finer zooming became possible.

Further, since the subject is displayed by the electronic image display, the shooting range can be displayed without using a new mechanism for displaying the pseudo focal length.

When the photographer sets the image quality setting switch to FINE in order to take a high-quality photograph, the camera prohibits the pseudo focal length, and the photographer can take a high-quality photograph.

The photographer determines the upper limit of the trimming magnification value based on the print size set by the print size setting switch. Therefore, even if the photograph size is extended to the print size desired by the photographer, a photograph in which the deterioration of the image quality is not noticeable can be obtained.

(Fourth Embodiment) FIGS. 37, 38, and 39 show a fourth embodiment.

The camera of this embodiment is a camera having two pseudo focal lengths T'and T "capable of taking a photograph at a further telephoto position than the focal length at the telephoto end of the actual focal length. The different parts from the camera of the form 1 are the shapes of the second cam groove 144b and the third cam groove 144c arranged in the second differential cam barrel 144, and the first cam groove 210a and the second cam groove 210a on the finder cam plate 210. Third cam groove 210b, 2
The shape is 10c.

FIG. 37 is a development view of the inner diameter portion of the second differential cam barrel 144, and includes a second cam groove 144b for driving the first lens group 153 and a third cam groove for driving the second lens group 152. 144c is arranged.

Three first-group cam pins 14 provided outside the first-group lens barrel 145 holding the first lens group 153.
5a and three second group cam pin portions 1 provided outside the second group lens holder 148 that holds the second lens group 152.
48a is at the position of the solid line circle in the figure which is the tele state of the actual focal length. From this Tele position, T'and T "
The cam portion between is the portion used for zooming to the pseudo focal length.

In FIG. 39, the front end 210a1 of the first cam groove on the finder cam plate 210 is extended from the Tele position to T ″. The rear end 210a2 of the first cam groove.
Also extends from the tele position to T ″, but its inclination is different from wide to tele. The second cam groove 210b and the third cam groove 210c are
e) The cam groove is curvedly extended from the position to T ″ so that the viewfinder shows the photographing range at the pseudo focal length of T′T ″.

Next, the zooming operation from the tele state to T ″ beyond T ′ will be described.

The taking lens is in the tele position, and the photographer
When the zooming signal processing circuit determines that the zoom position is T ″ by continuously pressing the zooming operation member of the camera for a certain time, the first rotation of the motor 108 causes the first rotation of the first lens group to move the first lens group cam pin 145a and the second lens group. The second-group cam pin 148a for moving exceeds T'and stops at T ".

By the rotation of this motor, as shown in FIG.
The pin portion 143e of the first linear guide cylinder 143 extends from the T position to the A position in the first cam groove 210a, comes into contact with the front end 210a1 of the first cam groove, and then the finder cam plate 2
While rotating 10, it moves through the B position to the C position and rotates the finder cam plate 210. This FIG.
Then, for convenience of explanation, although the pin portion 143e of the first straight guide cylinder 143 is moved vertically and horizontally on the paper surface,
In reality, the finder cam plate moves only up and down on the paper surface (in the optical axis direction), and moves to the left and right on the paper surface (rotation around the optical axis).

The rotation of the finder cam plate 210 causes the dowel parts 214c and 21c of the objective lens of the finder.
5c moves from the tele position beyond T'to T'and moves to T ", and the view field range of the finder changes to T" of the pseudo focal length.

Next, the photographer releases the release button 13 of the camera.
When 0 is pressed and a shooting operation is performed, the camera adjusts the focus according to the distance to the subject, and thus the first differential cam barrel 142 is used.
Is applied with a rotational force from the motor 108, the pin portion 143e of the first rectilinear guide cylinder 143 is moved from the C position to the D position, and comes into contact with the rear end 210a2 of the first cam groove, causing the finder cam plate to rotate in the reverse direction. After passing through the E position while temporarily stopping at the T position, the motor reversely rotates and stops moving to a position between T and A according to the subject distance. Then, after opening and closing the shutter and winding the film, the motor 108 is rotated and the pseudo focal length at the position C is again T ″.
Return to.

As described above, the second differential cam for guiding each of the lens groups by drawing a predetermined locus in the optical path with respect to the image plane so that the image magnification adjustment and the focus adjustment are alternately performed. By extending the tele end sides of the second cam groove 144b and the third cam groove 144c arranged in the cylinder 144, the subject range from the tele end to the pseudo focal length equal to or longer than the tele end focal length can be continuously viewed with the finder. Can be changed.

In FIG. 38, when the telescopic end sides of the second cam groove 144b and the third cam groove 144c arranged in the second differential cam barrel 144 are extended, the inclination of the cam is made small so that the photographic lens The amount of movement is small and zooming is possible with a small force. The second cam groove 1 from the wide end to T "
Since the total extension amount of 44b is small, the lens barrel can be shortened and the camera can be downsized.

(Fifth Embodiment) The mechanical structure of the fifth embodiment is almost the same as that of the first embodiment, and the value of the pseudo focal length electrically controlled is different as shown in Table 1. The n pseudo focal lengths between adjacent real focal lengths are obtained by multiplying the trimming magnification by about (1 / n + 1) times the ratio of the adjacent real focal lengths.
(2 / n + 1) -multiplied ... (n / n + 1) -multiplied.
For example, three pseudo focal lengths are set between Wide and Zp1, and the trimming magnification of them is (50/35).
^{1 / (3 + 1)} = 1.093, (50/35) ^{2 / (3 + 1)} = 1.1
95, (50/35) ^{3 / (3 + 1)} = 1.307. As a result, the screen change due to zooming becomes an area ratio, so the photographer feels that the zooming is smooth.

[0204]

[Table 1]

(Sixth Embodiment) The mechanical structure of the sixth embodiment is substantially the same as that of the first embodiment, and the value of the pseudo focal length electrically controlled is different as shown in Table 2. For n pseudo focal lengths between adjacent real focal lengths, the trimming magnification is approximately (1 / n + 1) times the ratio of the adjacent real focal lengths, (2
/ N + 1) times ... (n / n + 1) times. For example, W
Three pseudo focal lengths are set between ide and Zp1,
Their focal length is 35+ (50/35) × 1 / (3
+1) = 38.75 mm, 35+ (50/35) × 2 /
(3 + 1) = 42.5 mm, 35+ (50/35) × 3 /
(3 + 1) = 46.25 mm. As a result, the change in the screen caused by zooming feels like smooth zooming. Also, since it is a simple calculation formula, it is easy for the user to understand.

[0206]

[Table 2]

(Seventh Embodiment) The mechanical structure of the seventh embodiment is almost the same as that of the first embodiment, and the value of the pseudo focal length electrically controlled is different as shown in Table 3. For one pseudo focal length between adjacent real focal lengths, the trimming magnification is set to about (1/2) times the ratio of the adjacent real focal lengths. For example, three pseudo focal lengths are set between Wide and Zp1, and the focal length is 35+ (50/3
5) x 1/2 = 42.5 mm. As a result, the change in the screen caused by zooming feels like smooth zooming. Further, since one pseudo focal length is arranged between the simple calculation formula and the actual focal length, it is easy for the user to understand.

[0208]

[Table 3]

[0209]

As described above, the first aspect of the present application
According to the invention, it is possible to provide a camera capable of fine zooming and photographing.

According to the second invention of the present application,
It is possible to provide an optical device such as a camera that can perform fine zooming and photographing even in a photographing lens that alternately performs image magnification adjustment and focus adjustment.

According to the third invention of the present application, it is possible to provide an optical device such as a camera capable of zooming without a sense of discomfort, in which a change in focal length monotonously increases or decreases during zooming.

According to the fourth invention of the present application, during zooming, the change in the screen area of the pseudo focal lengths between the adjacent real focal lengths becomes the same size change, and a smooth zooming is possible in a camera or the like. An optical device can be provided.

According to the fifth invention of the present application, during zooming, the change in the screen length between the pseudo focal lengths and the actual focal lengths before and after is changed by a factor of 1 ×, and the optics of a camera or the like capable of smooth zooming. Equipment can be provided.

According to the sixth invention of the present application, during zooming, the change in the screen area between the pseudo focal lengths and the actual focal lengths before and after the zoom focal length changes by the same factor, and an optical device such as a camera capable of smooth zooming. Can be provided.

According to the seventh invention of the present application, it is possible to perform both screen type switching and pseudo focal length switching.

According to the eighth invention of the present application, it becomes possible to perform zooming during the actual focal length in which the interval between the actual focal lengths tends to be the largest, and a smooth zooming operation becomes possible. According to the ninth invention of the present application, it is possible to continuously switch to the pseudo focal length of the focal length exceeding the actual focal length.

According to the tenth invention of the present application, the optical equipment such as a camera can be downsized.

According to the eleventh invention of the present application, it is possible to reliably observe the subject even at the pseudo focal length.

According to the twelfth invention of the present application, at the time of shooting at the pseudo focal length, shooting is performed with the smallest trimming magnification, so that it is possible to shoot with little deterioration in image quality.

According to the thirteenth invention of the present application, it is possible to show the visual field range of the pseudo focal length with a simple mechanism.

According to the fourteenth invention of the present application, it is possible to provide an optical device such as an electronic camera capable of fine zooming and photographing.

According to the fifteenth invention of the present application, even in a taking lens which alternately performs image magnification adjustment and focus adjustment,
It enables fine zooming and shooting.

According to the sixteenth invention of the present application, at the time of shooting at the pseudo focal length, since the shooting is performed with the smallest trimming magnification, it is possible to take a picture with little deterioration in image quality and indicate the shooting range. Is possible.

According to the seventeenth invention of the present application, it is possible to obtain a photograph in which deterioration in image quality is not a concern even when printing.

According to the eighteenth invention of the present application, it is possible to obtain a photograph in which the image quality is not bothered even when printing.

According to the nineteenth invention of the present application, an optical device such as an electronic camera capable of obtaining a high-quality photograph can be provided by prohibiting trimming when high-quality photography is set. Can be provided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a lens barrel that is Embodiment 1 of the present invention.

FIG. 2 is a sectional view showing a retracted state of the lens barrel and a configuration of a control circuit.

FIG. 3 is a sectional view showing a wide state of the lens barrel.

FIG. 4 is a sectional view showing a telephoto state of the lens barrel.

FIG. 5 is a development view of a fixed barrel.

FIG. 6 is a development view of a first straight guide cylinder.

FIG. 7 is a development view of a second differential cam barrel.

FIG. 8 is an explanatory diagram of a moving cam locus of each lens group of the second differential cam barrel.

FIG. 9 is an exploded perspective view of a finder lens moving mechanism.

[Fig. 10] Development view of the finder cam plate (zooming from the sinking barrel to the wide side)

FIG. 11: Development view of finder cam plate (wide focusing)

FIG. 12 is a development view of the finder cam plate (from wide to Z
Zooming to p2)

FIG. 13 is a development view of the finder cam plate (focusing at Zp2)

FIG. 14 is a development view of the finder cam plate (from Zp2 to Z).
Zooming to p2 ')

FIG. 15 is a development view of the finder cam plate (focusing at Zp2 ′)

FIG. 16 is a development view of the finder cam plate (from Zp2 to Z).
Zooming to p1 ')

FIG. 17 is a development view of the finder cam plate (focusing at Zp1 ′).

FIG. 18 is a development view of the finder cam plate (zooming from Zp2 to tele)

FIG. 19 is a development view of the finder cam plate (telefocusing).

FIG. 20 is a development view of the second differential cam barrel (decompression barrel to wide zooming, wide focusing, wide to Zp2 zooming, Zp2 focusing).

FIG. 21 is a development view of a second differential cam barrel (Zp2 to Zp2
Zooming to ', focusing with Zp2')

FIG. 22 is a development view of the second differential cam barrel (Zp2 to Zp1.
Zooming to ', focusing with Zp1')

FIG. 23 is a development view of a second differential cam barrel (zooming from Zp2 to tele, focusing on tele)

FIG. 24 is a flowchart diagram of shooting in the first embodiment.

FIG. 25 is a flowchart of another different shooting operation according to the first embodiment.

26A is a block diagram of a finder information display unit according to the second embodiment, FIG. 26B is a finder display for H size, and FIG. 26C is a finder display for C size.
(D) shows the viewfinder display at the P size, and (e) shows the viewfinder display at the pseudo focal length.

FIG. 27 is a development view of the finder cam plate according to Embodiment 2 (zooming from Zp2 to Zp2 ′, actually Zp2).
Has stopped at the position)

FIG. 28 is a development view of the finder cam plate according to Embodiment 2 (focusing at Zp2 ′, actually focusing at Zp2).

FIG. 29 is a development view of the finder cam plate according to Embodiment 2 (zooming from Zp2 to Zp1 ′, actually Zp1).
Moved to zoom)

FIG. 30 is a development view of the finder cam plate according to Embodiment 2 (focusing at Zp1 ′, actually focusing at Zp1).

FIG. 31 is a development view of the second differential cam barrel according to the second embodiment, showing the movements of zooming and focusing.

FIG. 32 is a flowchart of shooting according to the second embodiment.

FIG. 33 is a lateral sectional view and a rear view of the camera according to the third embodiment.

FIG. 34 is a rear view of the camera at the first pseudo focal length.

FIG. 35 is a rear view of the camera at the second pseudo focal length.

FIG. 36 is a flowchart of shooting according to the second embodiment.

FIG. 37 is a development view of a second differential cam barrel.

38 is a development view of a second differential cam barrel having a shape different from that in FIG. 37. FIG.

FIG. 39 is a development view of the finder cam plate

FIG. 40 is a diagram of a lens locus, which is a conventional example.

FIG. 41 is an enlarged view of FIG. 21, which is a conventional example.

FIG. 42 is a correspondence table between focal lengths and output signals according to the first embodiment.

[Explanation of symbols]

108 ... Motor 109 ... Pulse plate 110 ... Pulse detection circuit 111 ... Motor control circuit 1112a ... Comparator 112b ... Comparator 113 ... Microcomputer 114 ... Subject distance detection circuit 115 ... Zooming signal processing circuit 116 ... Logic control circuit 117 ... Distance measuring module 118 ... Zooming operation member 120 ... Long axis gear 122 ... PI (photointerrupter) 130 ... Release button 141 ... Fixed barrel 141a ... Female helicoid 141b ... Flange portion 141c ... Hole 141d ... Key groove 141f / 141g ... Projection 142 ... First Differential cam cylinder 142a ... Rear end outer peripheral portions 142c and 142d ... Straight groove 143 ... First straight guide cylinder 143 ... a Rear flange 143b ... First cam groove 143c ... Projection 143d ... Stand 143e ... Pin 144 ... Second differential power Cylinder 144a ... Opening 144b ... Second cam groove 144c ... Third cam groove 145 ... First group lens barrel 145a ... First group cam pin 146 ... Nut ring 146a ... Nut part 147 ... Second straight guide cylinder 147b ... Rear end flange part 147c. ... claw 148 ... second group lens holder 148a ... second group cam pin 149 ... first flare cut plate 149a ... opening 149b ... engaging section 150 ... second flare cut plate 150a ... engaged section 150e ... opening 151 ... second Differential cam barrel drive pin 152 ... Second lens 153 ... Leaf spring 154 ... Fixing ring 159 ... Camera body 210 ... Finder cam plate 210a ... First cam grooves 210b, 210c ... Second and third cam grooves 210d ... End surface 211 ... Viewfinder base plate 211a ... Hole 211b ... Grooves 212, 213 ... Viewfinder objective lens group 214, 2 5 ... Objective lens frames 214a, 215a ... Hole portions 214b, 215b ... Dowel portions 214c, 215c ... Dowel portion 216 ... Finder guide bar 217 ... Cam plate fixing spring 217a ... Projection 218 ... Triangular prism 219 ... Roof prism 220 ... Eyepiece 302 ... finder display control means 303 ... magnetic recording means 308 ... finder information display section (LCD: liquid crystal display) 304 ... LCD driving means 308a ... first shooting range mark 308b ... second shooting range mark 308c ... third shooting range mark 500 ... Main body 501 ... Lens barrel 502 ... Fixed barrel 503 ... Cam barrel 504 ... First lens group 505 ... Second lens group 510 ... Motor 511 ... Connection gear 512 ... Release button 513 ... Zoom operation member 514 ... Liquid crystal display plate 515 ... Electronic image sensor 516 ... Image recording medium 17 ... microcomputer 520 ... image quality setting switch 521 ... print magnification setting switch

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G03B 17/24 G03B 17/24 H04N 5/232 H04N 5/232 A

Claims (19)

[Claims] 1. A plurality of lens groups adjust the image magnification by moving in the optical axis direction with respect to an image forming plane, and a photographing lens capable of photographing at discontinuous focal lengths, and exposed through the photographing lens. And a trimming information giving means for giving a trimming magnification with respect to the actual focal length of the photographing lens to the image recording medium at the time of photographing in order to specify a range to be printed on the image recording medium. Between the adjacent real focal lengths,
An optical device having at least one pseudo focal length. 2. The image pickup lens has a plurality of lens groups, and each lens group draws a predetermined locus in an optical path with respect to an image forming plane to alternately perform image magnification adjustment and focus adjustment. The optical device according to claim 1, which is performed. 3. The optical apparatus according to claim 1, wherein the trimming magnification at each of the pseudo focal lengths is equal to or less than the ratio of adjacent real focal lengths. 4. The n pseudo focal lengths are set between the adjacent real focal lengths, and each trimming magnification is about (1 / n + 1) of a ratio of the adjacent real focal lengths. Multiplication,
(2 / n + 1) -multiplied ... (n / n + 1) -multiplied, The optical device according to claim 1 or 2. 5. The n pseudo focal lengths are set between the adjacent real focal lengths, and the pseudo focal lengths are (n + 1) between the adjacent real focal lengths. ) The optical device according to claim 1 or 2, wherein the values are equally divided. 6. One pseudo focal length is set between the adjacent real focal lengths, and each trimming magnification is about (1/2) times the ratio of the adjacent real focal lengths. The optical device according to claim 1 or 2, characterized in that. 7. A screen type of an aspect ratio to be printed on the exposed image recording medium is a first screen which is an aperture fully open screen, a second screen which is an aperture vertical size reduction screen, and an aperture left and right size reduction screen. In order to specify any one of the three types of three screens, a screen type assigning unit that assigns the screen type to the image recording medium at the time of shooting is provided, and one pseudo image is provided between the adjacent real focal lengths. 8. A focal length is set, and each trimming magnification is a ratio of the first screen and a screen of a portion commonly used for the second and third screens. The optical device according to Crab. 8. The pseudo focal length is provided only between a first actual focal length, which is the widest focal length, and a second actual focal length, which is the next widest focal length. The optical device according to any one of claims 1 to 5. 9. A plurality of lens groups are provided, and each lens group draws a predetermined locus in the optical path with respect to an image plane, whereby image magnification adjustment and focus adjustment are alternately performed, and discontinuity occurs. In order to specify the photographing lens capable of photographing at the focal length and the range to be image-outputted to the exposed portion exposed through the photographing lens, the trimming magnification with respect to the actual focal length of the photographing lens is set in the image recording medium at the time of photographing And a trimming information giving means for giving a guide to each of the lens groups by drawing a predetermined locus in the optical path with respect to the image plane so that the image magnification adjustment and the focus adjustment of the photographing lens are alternately performed. An optical device comprising: a first guide means for performing the above-mentioned first guide means; and a second guide means for moving each of the lens groups to a pseudo focal length on an extension of the first guide means. 10. The optical apparatus according to claim 9, wherein the locus of the second guide means is a locus having a movement amount different from that of the first guide means. 11. A photographing range having a pseudo focal length when the subject group has a subject observing means that indicates a photographing range in association with driving of the photographing lens and the lens group is guided by the second guiding means. The optical device according to claim 9, wherein the optical device is switched to. 12. A distance measuring means for measuring a distance to an object, a release means for exposing the image medium at the time of photographing, and a zoom operation means for designating an arbitrary focal length of the photographing lens. When the focal length is the actual focal length, the first lens focusing control means for moving the photographing lens to the focusing position obtained by the distance measuring means and the focal length designated by the zoom operating means are In the case of the pseudo focal length, the photographing lens has second lens focus control means for moving the lens to the focus position obtained by the distance measuring means at the adjacent real angle on the wide angle side. The optical device according to any one of claims 1 to 11, which is characterized. 13. An observation range switching means capable of changing an observable range of the subject observation means, the observation range switching means comprising: The optical device according to any one of claims 1 to 12, wherein the observation range is changed to a narrower observation range in the case of the pseudo focal length than in the case of the actual focal length. 14. A photographing lens capable of photographing at discontinuous focal lengths by adjusting the image magnification by moving a plurality of lens groups in the optical axis direction with respect to the image forming plane, and an electric image forming by the photographing lens. An electronic image pickup device for converting into a signal, an image recording medium for recording an image obtained by the electronic image pickup device, and an image processing record for image-processing an electric signal from the electronic image pickup device and recording it on an image recording medium. Means, an electronic image display means for electrically displaying an image obtained by the electronic image pickup device, and in the exposed electronic image pickup device, for designating a range to be recorded on the image recording medium, Trimming information giving means for giving the image processing means a trimming magnification with respect to the actual focal length of the photographing lens is provided, and the photographing lens has at least one pseudo focal point between adjacent real focal lengths. Optical equipment characterized by having a point distance. 15. The photographing lens has a plurality of lens groups, and each lens group draws a predetermined locus in an optical path with respect to an image forming plane to alternately perform image magnification adjustment and focus adjustment. The optical device according to claim 14, which is performed. 16. A distance measuring means for measuring a distance to an object, a lens driving means for driving the photographing lens, a zoom operation means for designating the photographing lens at an arbitrary focal length, and a zoom operation means for photographing, Release means for exposing the electronic image sensor, and when the focal length designated by the zoom operating means is a pseudo focal length, moves to a focus position of the actual focal length on the wide angle side adjacent to the pseudo focal length. Subject focusing control means and the trimming information adding means for trimming an image exposed on the electronic image pickup device to display a photographable range on the electronic image display means 16. The optical device according to claim 14, further comprising: 17. A print size input means for inputting a print size at the time of printing, the total number of the electronic image pickup devices and the print size,
The trimming magnification determining means for determining the trimming magnification, and the optical device according to any one of claims 14 to 16. 18. The trimming magnification is equal to or less than the ratio of the total number of the electronic image pickup devices to the area of the stretched size (square inch) × 300 × 300.
The optical device according to any one of 4 to 17. 19. A first image quality recording setting means for recording an image with the same number as the total number of pixels of the electronic image pickup device, and a second image quality for recording an image with a smaller number of pixels than the total number of pixels of the electronic image pickup device. 19. A recording setting means, and a photographing prohibiting means for prohibiting photographing at the pseudo focal length when the first image quality recording setting means is selected, according to any one of claims 14 to 18. The described optical equipment.