JPH06289482A - Camera - Google Patents

Abstract

PURPOSE:To provide a camera having an SLR finder capable of easily confirming a subject and photographing information at proper magnification even if a trimming photographing mode is selected. CONSTITUTION:The camera is composed of a selecting switch 41 changing over a normal photographing mode and the trimming photographing mode capable of specifying a region narrower than that printed in the normal photographing mode as a photographing range, a finder visual field frame 7 composed of an LCD panel changing the size of a finder visual field mask in accordance with the changeover of a photographing mode and a photographing information display part displaying the photographing information moved by the increase of the finder magnification in accordance with each photographing mode of the selected pseudo telephoto mode, a panoramic photographing mode, etc., in spite of the photographing mode in the position of are almost constant prescribed distance from the boundary of the formed visual field mask.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a trimming photographing mode in which a photographing range for picking up and printing a part of a screen range by photographing in a normal photographing mode can be designated.

[0002]

2. Description of the Related Art Generally, there is a trimming technique in which a part of the screen of a film photographed in a normal photographing mode is taken out and printed.

In recent years, there has been a camera equipped with a trimming photographing mode capable of designating a region narrower than a normal printed region of a film as a photographing range at the time of photographing, and it is known as, for example, a panoramic photograph.

As a camera having this trimming photographing mode, for example, JP-A-61-223831, JP-A-1-107240, and JP-A-2-120834.
Japanese Patent Laid-Open No. 61-285432 and Japanese Patent Laid-Open No. 61-285432 propose a camera having a trimming photographing mode and an improved viewfinder.

[0005]

However, in the camera disclosed in Japanese Unexamined Patent Publication No. 61-223831 in the above-mentioned publication, the field frame becomes narrow as the trimming ratio increases, and it becomes difficult to confirm or frame the viewfinder image. . In addition, in this method, if a general information display in which the display section of the shooting information is outside the field frame is used, the field frame moves to a narrow range near the center of the screen according to the trimming, so the display of the shooting information This causes a problem that it is difficult to confirm the information because the shooting screen is separated from the shooting screen.

Further, in Japanese Patent Laid-Open No. 1-107240, an attempt is made to solve the above-mentioned problem that the field frame becomes narrow and small at the time of trimming, but no consideration is given to the display of photographing information, and the method as it is. However, if the eyepiece part of the finder is changed to increase the finder magnification, there is a drawback that vignetting around the field of view of the finder makes it difficult to see the photographed information. Further, in JP-A-2-120834 and JP-A-61-285432, , Is trying to change the magnification with the finder objective lens,
Not directly applicable to traditional SLR viewfinders. In addition, the objective optical system has a large optical system, requires a space, and is costly.

For example, as in the case of the display section of the viewfinder shown in FIG. 9, when the field of view frame is narrowed to indicate the shooting range 103 in correspondence with the conventionally proposed trimming, the field of view field 101 in the normal shooting mode is outside. The photographic information display unit 102 arranged at the position and the field frame 100 at the time of trimming are separated from each other, and the information is difficult to see or overlook.

That is, unless the finder magnification is increased, the field of view of the finder becomes small at the time of trimming, which makes it difficult to perform framing. On the other hand, when the finder magnification is increased, vignetting occurs around the field of view. For example, if a display section for photographing information is provided outside the screen range, the display is “vignetting” and cannot be confirmed, or it is difficult to see.

Therefore, it is an object of the present invention to provide a camera having an SLR finder in which a subject image and shooting information can be easily confirmed at an appropriate magnification even if a trimming shooting mode is selected.

[0010]

In order to achieve the above object, the present invention provides a normal photographing mode, a trimming photographing mode in which a region narrower than a region printed in the normal photographing mode can be designated as a photographing range, and Shooting mode switching selection means for switching shooting modes, viewfinder field mask forming means for changing the size of the viewfinder field mask according to the output of the shooting mode switching means, and the formation in the vicinity of the formed viewfinder field mask. Provided is a camera configured with photographing information display means for displaying photographing information so that the distance from the boundary portion of the visual field mask is substantially constant regardless of the photographing mode.

[0011]

In the camera having the above-mentioned structure, the finder field mask forming means operates to form the finder field frame according to the switching selection of the screen size by changing the lens interval in the finder. The size of the finder field mask is changed by the forming means, and the photographic information display means displays the photographic information at a certain distance from the field frame in the vicinity of the field frame.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

1 to 4 show the structure of a camera equipped with the trimming shooting mode function of the present invention, which will be described.

In FIG. 1, the camera body includes a lens barrel 2 for holding a taking lens, a main mirror 4 and a sub-mirror 5, and a light beam incident on the taking lens is directed to a finder optical system and an automatic focus detection device 19. A mirror box part that has a function of separating the light beam into a light beam and operates so that the mirror retreats during shooting and the light beam reaches the film 15 by the opening of the shutter 14, the focusing screen 6, and the viewfinder field depending on the switching selection of the screen size. A viewfinder section (LCD panel) 7 which operates to form a frame, a pentaprism 8, a variable magnification type fine loupe 9 including a movable optical lens 9 ', and a photometric element 18, and a film holding section. The pressure plate 17, the information recording device 16 for recording various kinds of information on the film, and the rear lid portion including the rear lid 1, It is configured Te. The information recording device 16 is for recording photographing information and the like on a film optically or electrically (magnetically recording). For magnetic recording, a film provided with a magnetic recording medium is used.

The first lens group 3 is held by the frame 12, and the second lens group 10 is held by the frame 13. Each of the lens groups 3 and 10 is configured so that the projections 30 and 31 are guided by the cam grooves 37 and 38 provided in the zoom frame 11, and move in the optical axis direction according to the rotation of the zoom frame.

The shaft 32 formed integrally with the frame 12 is
The frame 1 is fitted with a guide hole provided on the protrusion 33 of the main body.
The rotation of the frame 13 around the center of the optical axis is restricted by simultaneously engaging with the guide holes provided in the frame 3.

An encoder 35 for detecting the position of the zoom frame in the rotating direction is mounted on the circumference of the zoom frame 11, and a pattern 36 on the encoder 35 has an electric contact fixed in position. 34 is crimped.

When the photographer rotates the zoom frame 11 in order to enlarge or reduce the subject, this rotation angle can be detected by replacing it with an electrical signal. In the cam grooves 37 and 38 provided in the zoom frame 11, a first region in which the position of the cam groove changes in the optical axis direction as the zoom frame 11 rotates and the cam groove is perpendicular to the optical axis. There is a second region that is cut in the direction.

In the first area, when the projections 30 and 31 on the frames 12 and 13 are fitted in the cam grooves 37 and 38, the frames 12 and 13 are moved along the optical axis along the rotation of the zoom frame. Displace in the direction. On the other hand, when they are integrated in the second area,
The frames 12 and 13 are not displaced in the optical axis direction.

The above-mentioned first and second lens groups 3 and 10
Is an optical system that gives a variable magnification effect by changing the distance between each other and the distance from the film surface, and when the projections 30 and 31 are present in the first region of the cam groove, the zoom frame Rotation of the image causes optical scaling of the image. If there is a protrusion in this area, it is assumed that the camera is set to the optical zoom mode.

Next, the projections 30 and 3 are formed in the second region of the cam groove.
When 1, the optical zoom of the image on the film does not occur due to the rotation of the zoom frame. On the other hand, the zoom encoder 35 electrically detects the rotation of the zoom frame 11, that is, the amount of magnification change desired by the photographer. The signal of the zoom encoder 35 is transmitted to the CPU 42.

In this case, as shown in FIG.
Reference numeral 2 sends a field-of-view frame setting signal corresponding to the rotation of the zoom frame 11 to a viewfinder field frame 7 using a known LCD. As a result, as shown in FIG. 3, a viewfinder field frame in a range narrower than that of the normal screen is displayed in the viewfinder screen, and the printed area can be observed. The LCD is masked on the outside of this field frame to be non-transmissive, and only the inside is observed as a finder field. For example, in the state of “2 ×”, the normal screen 46 is displayed at the center of the finder screen.
Only the inside of the visual field frame 45 that encloses an area of about / 4 becomes transparent and the LCD can be observed. This means that this area is enlarged and printed on the size of the printing paper.

Further, the CPU 42 records the print screen range on the magnetic information recording section 43, as will be described later, in order to record in the magnetic recording section on the film what range the screen range to be used for printing is. Information is transmitted. This information may be a magnification display as shown in FIG. 3 or a screen range identification code.

In a developing / expanding laboratory, printing is performed based on the information on the film.
For example, if the zoom frame is rotated until shooting is performed until the “2 ×” field frame shown in FIG. 3 is displayed, only the center of the screen corresponding to the finder field frame 45 is enlarged and burned. Therefore, the same effect as when "2x" zooming is performed can be obtained. When in this state, the camera shall be in pseudo-telephoto mode.

In the panoramic shooting mode shown in FIG. 2, when the selection switch 41 is switched, the panoramic shooting mode for obtaining a print that is horizontally longer than the normal screen can be selected.
In the present embodiment, the panoramic shooting mode is considered to be included in a part of trimming because a part of a normal photograph is taken out and printed by limiting the image exposed on one frame of film. ing. , Again, FIG.
The magnetic information recording unit 43 shown in FIG. 7 uses the film provided with the magnetic recording medium (magnetic tape) along the back side of the film or along the perforations, and the magnetic recording / recording unit shown in FIG.
The reproduction circuit records / reproduces the above-mentioned photographing information.

Next, the magnetic recording / reproducing system used in this embodiment will be described with reference to FIGS.

According to this method, the magnetic recording medium can be set in three states of N-direction magnetization state, S-direction magnetization state and neutral state. For example, assume that the magnetization state in the N direction is "1" and the magnetization state in the S direction is "0", and a case where "1" is recorded on the magnetic recording medium will be considered. First, the OU of the CPU 112
When an “H” level signal is output to the T1 port, a current I ₁ flows through the coil of the recording head 8 via the buffer 121. At this time, the magnetic recording medium is magnetized in the N direction.
On the contrary, when "0" is recorded, OUT of the CPU 112
When an H level signal is output to the 0 port, a current I ₀ flows through the coil and it is magnetized in the S direction.

The advantage of this system is that since the neutral area is provided between bits, the boundary of bit data becomes clear and the synchronous cloak becomes unnecessary.

Next, when reproducing information from the magnetic recording medium, when the magnetized portion of the magnetic recording medium moves in front of the head, the magnetic field passing through the head changes, so that a voltage is generated. The voltage is amplified by the head amplifier 125 (e)
Then, the differentiation circuit 126 differentiates (f), and the comparator 12
Input to 7,128. For example, when the recorded data is "1", the differential output (f) has a negative peak because the output of the comparator 127 is inverted and
The "H" signal is input to the port IN1 of 112. Conversely, when the recorded data is "0", the differential output (f) has a positive peak, so the comparator 128 is inverted and C
The "H" signal is input to the port IN0 of PU12. By using this method, various kinds of information can be recorded on the film based on instructions from the CPU, including information on pseudo-telephoto and panorama mode selection.

When the pseudo-telephoto mode or the panoramic mode is selected according to the method described above, the outer peripheral portion of the normal finder screen is masked, and only the narrow central area is observed as the photographing range. If this is the case, the viewfinder field area will be too narrow compared to the normal case, making it difficult to observe. Therefore, in order to improve this, a method of raising the viewfinder magnification to view it in a magnified manner will be described with reference to FIG.

As described above, conventionally, when the finder magnification of the viewfinder field area is increased and enlarged, the photographic information and the like provided near the viewfinder screen also deviates from the recognizable field of view with the expansion of the field area ( Because it becomes difficult to confirm, and the shooting information withdraws by the width of the mask,
It was hard to see.

In FIG. 4, the finder light flux passing through the pentaprism 8 is observed through the first and second lenses 61 and 62. The lens 61 is a convex lens and is integrally molded with the arm 63 with a plastic resin. The arm 63 is screwed into a rotary shaft 64 having a threaded portion, and the rotary shaft 64 is formed integrally with the gear 65 and can only rotate by bearings 71 and 72 fixed to the space. It is supported like this. The gear 65 is connected to a motor 67 via a reduction gear train 66.

Then, it is judged by the output of the panorama mode selection switch that the panoramic photography mode is selected, or the output of the pseudo-telephoto mode setting means, for example,
In the embodiment shown in FIG. 1, if the output of the zoom encoder 35 transmits the zoom amount information due to the pseudo-telephoto to the CPU 42, the CPU 42 performs the zooming for correcting the finder field of view which becomes difficult to see. In order to use the fine loupe, the first lens 61 is moved to change the distance between the first and second lenses, and the motor 67 is controlled and driven so as to change the combined focal length of the fine loupe.

With this arrangement, the synthetic focal length of the first and second lenses of the finder magnifier is shortened as the pseudo-telephoto magnification is increased and the finder field is reduced, and the finder magnification is increased to make the finder easier to see. realizable.

Next, with reference to FIG. 5, a concrete viewfinder information display system in the camera of the above-described embodiment will be described.

FIG. 5A shows the viewfinder field when the normal photographing mode is selected. In the viewfinder field, the whole area 57 without trimming can be observed, and the information 50 regarding the shooting such as shutter speed, aperture, flash information, focusing information and date information is displayed on the outer portion 50 of the screen using a liquid crystal display device or the like. It is displayed with numbers and marks. At this time, the fine loupe described with reference to FIG. 4 is adjusted to a magnification that allows observation including the display of imaging information outside the field frame.

FIG. 5B shows the viewfinder field when the "1.4.times." Pseudo-telephoto mode is selected as an example. The LCD 53 is in a non-transmissive state on the outer side 53 of the field frame 52, and only the inner side of the field frame 52 can be used as a viewfinder field for observing a subject image. At the same time, the finder magnifier is driven by the CPU so that the finder has a high magnification in order to compensate for the reduced viewfinder field range. When the finder magnification is increased by changing the focal length of the loupe in this way, as a matter of course, as shown in FIG.
In the viewfinder field shown in (a), the portion that is visible in the periphery, that is, the photographic information display unit 50, becomes eclipseable or extremely difficult to see due to vignetting of the light flux reaching the eye.

As a method for solving such a drawback, FIG. 5B shows information necessary for photographing among the display contents of the photographing information display section 50 arranged outside the photographing screen in the normal photographing mode. A region closer to the center of the screen, that is, the field frame 57 in the normal shooting mode and the field frame 52 in the pseudo telephoto mode
The method of moving to the area between and and displaying it like the photographing information display unit 51 is shown. Further, in FIG. 5C, when the panoramic shooting mode is selected, a shooting information display unit 56 is provided in an area between the field of view frame 54 in the panoramic shooting and the field of view frame 57 in the normal shooting mode. It shows a method of moving to and displaying. By using these methods, it is possible to prevent vignetting on the display and difficulty in viewing due to an increase in the viewfinder magnification that accompanies the selection of the pseudo-telephoto mode or the panoramic shooting mode.

On the other hand, this implementation method is extremely easy.
That is, as already described with reference to FIGS. 1 and 2, the viewfinder frame in the pseudo-telephoto mode or the panoramic mode is formed and displayed in the vicinity of the focusing screen 6 by the known liquid crystal display device. Therefore, the arrangement of the transparent electrode for forming a light-shielding mask for non-transmission of light rays provided on the liquid crystal display plate is partially changed, and the photographing information display section 51, as shown in FIGS. 56 can be realized without particularly increasing the cost.

Further, FIG. 6 shows a method of illuminating the finder display device described so far when the field of view of the finder is dark such as at night.

In the finder display device shown in FIG. 6 (a), a penta prism 8, a finder field frame 7 of an LCD provided on the lower surface of the penta prism 8 and a focusing screen 6 below the penta prism 8 are provided. There is.

In the pentaprism 8, a triangular region 90 surrounded by the roof surface and the third reflecting surface 89 in the front.
A light guide 88 is joined to. Light emitted from a light emitting element 81 such as an LED connected to a substrate 80 enters a pentaprism 8 through a condenser lens 84 and an aperture 85, passes through the pentaprism, and then passes through a viewfinder frame 7 by an LCD. Illuminate. The CPU 42 for controlling the light emitting element 81 has information on the brightness detected by a known light receiving element for detecting the brightness of the finder field,
Signals indicating that the panoramic shooting mode and the pseudo-telephoto mode are set are input, and when it is determined that finder field illumination is necessary using these signals, the LED is caused to emit light to perform illumination automatically.

In FIG. 6B, instead of the solid pentaprism 8 made of glass or plastic, a reflecting mirror 86 called a roof mirror is used on the roof surface, and a plane mirror 87 is used also on the third reflecting surface. Illumination method in case

The illuminating device including the substrate 80, the light emitting element 81, the condenser lens 84 and the diaphragm 85 described above performs finder field illumination through the gap between the roof mirror 86 and the plane mirror 87 forming the third reflecting surface. According to this method, there is an advantage that the joining of the light guides and the light guide itself are unnecessary.

FIG. 6C shows an embodiment in which the illuminating device consisting of the substrate 80, the light emitting element 81, the condenser lens 84 and the diaphragm 85 is used to illuminate from below the finder field frame 7 by the LCD.

In this method, it is also possible to illuminate from below the focusing screen 6 and indirectly illuminate the viewfinder field frame through the focusing screen 6. The control of the lighting device shown in FIGS. 6B and 6C is the same as that in the case of FIG. 6A.

As described above, the finder information display system of this embodiment makes it possible to easily illuminate the finder field frame and the photographic information display section, which is effective when photographing in a dark scene.

Further, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications and applications can be made without departing from the scope of the invention.

[0049]

As described in detail above, according to the present invention, it is possible to provide a camera having an SLR finder in which a subject image and photographing information can be easily confirmed at an appropriate magnification even if a trimming photographing mode is selected.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a camera equipped with a trimming shooting mode function of the present invention.

FIG. 2 is a diagram showing a configuration of a viewfinder in a panoramic shooting mode according to the present embodiment.

FIG. 3 is a view showing a finder field frame of the finder.

FIG. 4 is a diagram showing a specific structure (fine loupe) in the finder of the camera of this embodiment.

FIG. 5 is a diagram showing a specific display example of finder information according to the present embodiment.

FIG. 6 is a diagram showing a configuration example for illuminating the finder display device of the present embodiment.

FIG. 7 is a diagram showing a configuration of a magnetic recording / reproducing circuit for recording / reproducing photographic information on / from a film magnetic recording medium.

8 is a diagram showing each signal of the magnetic recording / reproducing circuit shown in FIG. 7.

FIG. 9 is a diagram showing a shooting range of a field frame by conventional trimming.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rear lid, 2 ... Lens barrel, 3 ... 1st lens group, 4 ... Main mirror, 5 ... Sub-mirror, 6 ... Focus plate, 7 ... Viewfinder field frame, 8 ... Penta prism, 9 ...
9 '... Optical lens, 10 ... Second lens group, 11 ... Zoom frame, 12, 13 ... Frame, 13 ..., 14 ... Shutter, 15
... film, 16 ... information recording device, 17 ... film holding pressure plate, 18 ... photometric element, 19 ... automatic focus detection device, 3
0, 31, 33 ... Protrusion, 32 ... Shaft, 34 ... Electrical contact, 3
5 ... Zoom encoder, 36 ... Pattern, 37, 38 ...
Cam groove, 42 ... CPU, 43 ... Magnetic information recording section.

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[Procedure amendment]

[Submission date] August 3, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction content]

As a method for solving such a drawback, FIG. 5 ( c ) shows information necessary for photographing among the display contents of the photographing information display section 50 arranged outside the photographing screen in the normal photographing mode. A region closer to the center of the screen, that is, the field frame 57 in the normal shooting mode and the field frame 52 in the pseudo telephoto mode
The method of moving to the area between and and displaying it like the photographing information display unit 51 is shown. Further, in FIG. 5B , when the panoramic shooting mode is selected, a shooting information display unit 56 is provided in an area between the field of view frame 54 in the panoramic shooting and the field of view frame 57 in the normal shooting mode. It shows a method of moving to and displaying. By using these methods, it is possible to prevent vignetting on the display and difficulty in viewing due to an increase in the viewfinder magnification that accompanies the selection of the pseudo-telephoto mode or the panoramic shooting mode.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0048

[Correction method] Change

[Correction content]

Further, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications and applications can be made without departing from the scope of the invention. For example, in the embodiment shown in FIG. 6, an example of illuminating the front side of the camera optical axis of the focusing screen 6 is shown, but the illumination may be performed on any part of the focusing screen 6, and accordingly, the photographing information section is The same method can be applied to either the top, bottom, left, or right of the viewfinder frame.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0049

[Correction method] Change

[Correction content]

[0049] According to the present invention as described in detail above, it is possible to provide a camera object image and the photographing information in a proper magnification by selecting a trimming photographing mode has an easy off Ainda confirmation.

Claims (1)

[Claims] 1. A normal shooting mode, a trimming shooting mode in which an area narrower than the area printed in the normal shooting mode can be designated as a shooting range, shooting mode switching selection means for switching the shooting mode, and the shooting mode switching Finder field mask forming means for changing the size of the finder field mask according to the output of the means, and the distance from the formed field mask boundary portion in the vicinity of the formed finder field mask regardless of the photographing mode. A camera comprising: shooting information display means for displaying shooting information so as to be substantially constant.