JPH0882842A - Camera - Google Patents

Abstract

PURPOSE: To inform a photographer of the image quality information so that the photographer can avoid photographs with image defects by generating the image quality information which indicates the degree of quality of a printed image when an image is printed from a film to a photographic paper. CONSTITUTION: The silver particle size γ of a printed image when an image is printed from a film to a photographic paper is calculated by a controlling means 10 based on the trimming magnification S1 , ISO sensitivity of the film, format of the print image, and the desired print size. The particle size γ thus obtd. is checked whether it is in the allowance of the particle size sent from an input means 14 for the allowable particle size. The information is informed by a sound means 76 or an LCD for the display in the finder or an LCD of external display based on the result of checking. Thereby, the photographer can know the degree of picture quality according to the particle size of the printed image by auditory or visual sense.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to cameras.

[0002]

2. Description of the Related Art Image quality such as graininess of a printed image and blur of a subject when printed on a photographic paper from a film that has already been photographed is film sensitivity, print screen format, print size, exposure at the time of photography, Depending on various conditions such as the distance from the camera to the subject and the focal length of the photographic optical system at that time, the image quality of this printed image can often be visually confirmed only after it is printed. , Shooting without knowing the quality of the print image. Therefore, depending on the above conditions, there is a problem that the image quality is worse than the photographer's imagination.

Further, a trimming zoom camera (camera) capable of recording trimming information on a film is known. In such a camera, only the viewfinder optical system is zoomed during zooming, and the zooming ratio and zoom range due to zooming during shooting, that is,
Trimming information that specifies the screen area on the film corresponding to the actual field of view viewed by the finder optical system is written on the film. Then, when printing the photographed film on the photographic paper, trimming is performed based on the trimming information read from the film, whereby a photograph having a pseudo telephoto effect can be obtained.

However, in the case of this trimming zoom camera, the image is enlarged on the basis of the trimming information at the time of printing, so that the image quality fluctuates greatly. For this reason, if the trimming zoom is performed randomly, the film is trimmed by the trimming. The silver particles and the blurred area are also enlarged and printed, which causes the problem that the particles are coarse, the blur is conspicuous, and the image quality is poor.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to inform a photographer of image quality information indicating a degree of image quality of a print image when printed on a photographic paper from a film, and avoid a photograph having poor image quality. To provide a camera.

[0006]

These objects are achieved by the present invention described in (1) to (7) below.

(1) A photographing optical system for forming a subject image on a film surface, an image quality information creating means for creating image quality information indicating a degree of image quality of a print image when printed from a film to a photographic paper, A camera having a notifying unit for notifying image quality information.

(2) The image quality information is at least one of film sensitivity, print screen format, print size desired by the photographer, exposure information, distance from camera to subject, and focal length of the photographing optical system. The camera according to (1) above, which is determined based on information.

(3) A photographing optical system for forming a subject image on a film surface, and a finder optical system capable of changing the magnification, and the magnification of the finder optical system is changed to perform zooming. This is a camera that obtains a pseudo telephoto effect by printing the screen area on the film corresponding to the actual field of view seen on the system on the photographic paper, and the image quality of the printed image when printed from the film to the photographic paper. The image quality information creating means for creating the image quality information indicating the degree of the image quality and the informing means for informing the image quality information are provided, and the image quality information created by the image quality information creating means is informed by the informing means. A camera characterized by that.

(4) The camera according to the above (3), further comprising recording means for recording trimming information for specifying a screen area on the film corresponding to an actual visual field screen visually recognized by the finder optical system.

(5) The camera according to (4), wherein the recording means is capable of recording the image quality information created by the image quality information creating means.

(6) The image quality information is trimming information for specifying a screen area on the film corresponding to an actual view screen visually recognized by the finder optical system, film sensitivity, print screen format, print desired by a photographer. The camera according to any one of (3) to (5) above, which is determined based on at least one of size, exposure information, a distance from a camera to a subject, and a focal length of the photographing optical system.

(7) The camera according to any one of (1) to (6), wherein the notification is performed at the time of photographing.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The camera of the present invention will be described below in detail with reference to the preferred embodiments shown in the accompanying drawings. FIG. 1 is a perspective view showing a first embodiment of the camera of the present invention. As shown in the figure, the camera (trimming zoom camera) 1 of the first embodiment
A has a camera body 2, and on the front surface (front surface) of the camera body 2, a photographing optical system 30, a lens barrel 31 of the photographing optical system 30, and a distance measuring unit 74 are provided on the rear surface of the camera body 2. The zoom lever 72 is provided on the upper surface of the camera body 2 as a liquid crystal display element (LCD) for external display which is an external display means.
5, a sound producing means 76, a release switch 71, and a plurality of mode selection buttons 77 are respectively installed, and a viewfinder optical system (finder variable magnification optical system) 4 capable of changing the magnification from the front to the back of the camera body 2 is provided. is set up.

Further, the camera 1A is provided with a trimming zoom means (variable magnification means) for changing the magnification of the finder optical system 4.
have. FIG. 2 is a perspective view showing a configuration example of the trimming zoom means of the camera 1A. As shown in the figure,
The trimming zoom means 1a has a zoom motor 11 for driving a zoom and a cam plate 43 having a substantially rectangular overall shape. The cam plate 43 is movably installed in the camera body 2 in a direction perpendicular to the optical axis 45 of the finder optical system 4.

The finder optical system 4 is arranged in order from the objective side.
First variable-magnification optical system lens 41, second variable-magnification optical system lens 42, and eyepiece optical system not shown (eyepiece lens)
The second variable-magnification optical system lens 42 is installed movably in the direction of the optical axis 45 of the finder optical system 4 with respect to the camera body 2, and the first variable-magnification optical system lens 41 and Each eyepiece optical system is fixedly installed on the camera body 2.

The cam plate 43 has a cam groove 431 and a guide groove 432 for restricting the direction when the cam plate 43 is moved.
And are formed. In this case, the guide groove 432 is formed in a direction perpendicular to the optical axis 45 of the finder optical system 4, and the cam groove 431 is formed to be inclined at a predetermined angle with respect to the guide groove 432.

Two protrusions 441 and 442 formed on the camera body 2 are inserted into the guide groove 432, and the cam plate 43 is provided with the guide groove 432 and both protrusions 44.
1, 442 can move only in the longitudinal direction of the guide groove 432.

The second variable power optical system lens 42 is restricted by a restriction member (not shown) so that it can move only in the direction of its optical axis 45, and the cam groove 431 has a second variable power lens 42. Protrusion 42 that is provided under the double optical system lens 42
1 is inserted. When the cam plate 43 is moved, the protrusion 421 moves along the cam groove 431, and the second
The variable power optical system lens 42 moves in the direction of the optical axis 45.

Here, one end of the cam groove 431 has a wide-angle end 46.
1, the other end of the cam groove 431 is a telephoto end 462.
At the wide-angle end 461, the real-field-of-view screen visually recognized by the finder optical system 4 corresponds to the screen area corresponding to the print screen format of the screen on the film 100.
In the range from 1 to the telephoto end 462, excluding the wide-angle end 461, the real view screen visually recognized by the finder optical system 4 and the screen trimmed on the film correspond to each other.

Power from the zoom motor 11 is transmitted to a cam plate 43, which is a driven member, via a speed change mechanism (power relay portion) 9 having a plurality of gears including a pinion gear 91, whereby the cam plate 43 is moved. The guide groove 432 is configured to be movable in the longitudinal direction. In this case, the cam plate 4
A rack gear 433 that meshes with the pinion gear 91 of the transmission mechanism 9 is formed on the rear surface of the front end portion of the No. 3 along the direction parallel to the guide groove 432.

In the camera 1A, pseudo zooming (trimming zoom) is performed by such a trimming zooming means 1a. Note that the "pseudo variable power" is a film corresponding to an actual visual field screen in which the photographic optical system 30 is not zoomed but the finder optical system 4 is zoomed and visually recognized by the scaled finder optical system 4. Trimming the upper screen area and printing the trimmed area obtains the telephoto effect.

On the surface of the rear end portion of the cam plate 43, a zoom code plate 81 is installed. This zoom code board 81
Has a predetermined pattern of conduction and non-conduction in the guide groove 432.
It has the conductive plates formed and arranged in four rows along the direction parallel to. A zoom code is formed by this conductive plate.

The camera body 2 is also provided with a zoom cord contact piece 85 having four contact points. The zoom cord contact piece 85 is arranged so that its four contacts come into contact with the zoom cord of the zoom cord plate 81.

The zoom code plate 81 and the zoom code contact piece 85 constitute detection means for detecting the position of the cam plate 43 with respect to the camera body 2. in this case,
Depending on the ON / OFF pattern between the four contact points of the zoom cord contact piece 85 when they contact the zoom cord,
The position of the cam plate 43 with respect to the camera body 2 is detected, and the viewfinder optical system 4 after zoom driving corresponding to this position is detected.
The zoom magnification, that is, the trimming magnification S (trimming information) and the like are specified.

Here, the "trimming magnification S" means
The enlargement ratio of the trimming at the time of printing, that is, as shown in FIG. 8, a full-size frame (shooting) on the screen area 104 on the film 100 corresponding to the actual view screen visually recognized by the finder optical system 4 (shooting). screen)
The area ratio (≧ 1) of the screen area corresponding to the print screen format 103. The trimming magnification S corresponds to the magnification of the finder optical system 4 when the wide-angle end 461 is set to 1.

FIG. 3 is a partial sectional view showing the camera 1A. As shown in the figure, the camera 1A has a magnetic head 12 as a recording means. This magnetic head 12
It is arranged on the back side of the film 100 loaded in the camera 1A and at a position where it can face a magnetic track of the film 100 described later.

As shown in FIG. 3, the cartridge 100 is loaded in the cartridge loading section 27 of the camera 1A, one end of the film 100 exposed from the cartridge P is wound around the spool 28, and the back lid (not shown) is closed.
Is once wound around the spool 28, and the traveling is stopped at the shooting start position.

After filming, the film 100 is
Until the next frame, the film is wound on the film winding shaft P1 installed in the cartridge P. And at the same time,
An electric signal of information to be recorded is input to the magnetic head 12, electromagnetically converted by the magnetic head 12, and magnetically recorded on a magnetic track of the running film 100.

FIG. 8 shows a screen area on the film 100,
It is a schematic diagram showing a correspondence with a screen on photographic paper. As shown in the figure, a magnetic track 101 is formed on one end side of the film 100 along the longitudinal direction thereof. On the magnetic track 101, the screen area 10 on the film 100 corresponding to the print screen format, the desired print size, and the actual view screen visually recognized by the finder optical system 4.
As the trimming information for specifying No. 4, various information such as the trimming magnification S and image quality information described later is recorded by the magnetic head 12. Further, on the other end side of the film 100, a perforation 102 for film running control (film running and detection) is provided.

4 and 5 respectively show the camera 1A.
It is a figure which shows the inside of the finder. As shown in FIG.
The camera 1A has a liquid crystal display element (LCD) 6 for in-viewfinder display, which is in-viewfinder display means. As shown in FIG. 4, on the left side of the finder screen 63 in the finder in FIG.
A display area 60 for displaying by the CD 6 is formed. At the bottom of the display area 60, image quality information indicating the degree of image quality of the print image when printed from the film 100 to the photographic paper 110 is displayed by a star symbol 61. In this case, the number of stars displayed (0, 1,
The degree of image quality is shown by 2, 3), and the smaller the number of stars, the better the image quality.

The image quality information includes trimming information (trimming magnification S), film 100 sensitivity (ISO sensitivity),
Print screen format (Hi-Vision size, 35
mm size and panorama size), print size desired by the photographer (service size, cabinet size, 6
Off, 4 out, half-cut and all paper), exposure information (aperture etc.),
Distance from camera 1A to subject and photographing optical system 30
It is created based on predetermined information of the focal lengths of the.
The trimming information (trimming magnification S) is used not only for designating the trimming magnification at the time of printing but also as information for creating the image quality information. Further, as shown in FIG. 5, in the lower part of the display area 60, in addition to the image quality information, the trimming magnification S is displayed by “numerals”, “·” and “x” symbols 62.

6 and 7 show the camera 1A, respectively.
3 is a plan view showing a display example of the LCD 5 for external display of FIG.
As shown in FIG. 6, image quality information indicating the degree of image quality of a print image when printed from the film 100 onto the photographic paper 110 is displayed by a star symbol 51 on the lower right side of the LCD 5 in FIG. In this case, similarly to the display in the viewfinder, the number of displayed stars (0, 1, 2, 3) indicates the degree of image quality. The smaller the number of stars, the better the image quality. Further, as shown in FIG. 7, in the central portion of the LCD 5,
The trimming magnification S is displayed by the "number", ".", And "x" symbols 52.

FIG. 9 is a block diagram showing a circuit configuration example of the camera 1A. As shown in the figure, the camera 1A has a control means 10. This control means 10 is usually
It is composed of a microcomputer (CPU) and creates image quality information indicating the degree of image quality of a print image when it is printed from the film 100 to the photographic paper 110 described later, as well as sequence control, exposure calculation, automatic exposure and automatic focusing. 1A for execution of recording, recording control of magnetic head 12, etc.
Control various functions in.

The control means 10 includes a release switch 71.
a, photometric distance measuring switch 71b, telephoto side zoom switch 7
2a, wide-angle side zoom switch 72b, print screen format selection switch 73, distance measuring means 74, photometric means 7
5, zoom code contact piece 85, allowable particle size input means 1
4, film running detection means 16, ISO sensitivity detection means 1
7, desired print size input means 18, photographing optical system detection means 19, zoom control means 20, film running control means 21, notification control means 22, information recording control means 23, aperture drive means 24, focus drive means 25 and shutter drive. Means 26 are each electrically connected.

Further, the zoom control means 20 has a zoom motor 11, the film travel control means 21 has a film travel motor 13, and the notification control means 22 has a sounding means 76.
LCD 6 for viewfinder display and L for external display
The magnetic head 12 is included in the CD 5 and the information recording control means 23.
Are electrically connected to each other.

The release switch 71 shown in FIG. 1 is composed of a two-stage switch. When the photometric distance measuring switch 71b (first stage) is turned on, a photometric means 75 and a distance measuring means 74, which will be described later, respectively operate, and further, Release switch 7
When 1a (second stage) is turned on, the shutter is driven by the shutter drive means 26 to take an image.

When the zoom lever 72 is displaced to the telephoto side, the telephoto side zoom switch 72a is turned on, and the zoom control means 20 moves the zoom motor 11 to the telephoto side while the telephoto side zoom switch 72a is turned on. Drive it. As a result, zooming of the finder optical system 4 to the telephoto side is performed.

Conversely, when the zoom lever 72 is displaced to the wide-angle side, the wide-angle side zoom switch 72b is turned on, and the zoom control means 20 keeps the zoom motor 11 in the wide-angle side while the wide-angle side zoom switch 72b is on. Drive to. As a result, zooming of the finder optical system 4 to the wide angle side is performed. Regarding the function of this zooming,
It will be described in detail later.

Print screen format selection switch 7
3 is a switch for selecting a print screen format, that is, a normal size (35 mm size, an aspect ratio of 2: 3), a panoramic size (aspect ratio of about 1: 3) and a high-definition size (aspect ratio of 9:16). Is a switch for selecting any of the above, and when a desired print screen format is selected by the print screen format selection switch 73, the selected print screen format is set.

When the print screen format is set to the normal size (35 mm size) or the panorama size, at that time, as shown in FIG. 4, the actual view screen visually recognized by the finder optical system 4 is not shown. By masking a part of the finder screen (high-definition size finder screen) 63 by the above device, the screen is changed to a screen having the same aspect ratio as the print screen format set above. In FIG. 4, a screen surrounded by a one-dot chain line is a finder screen 64 in a normal size (35 mm size), and a screen surrounded by a two-dot chain line is a finder screen 65 in a panoramic size. The masking is performed, for example, by shielding the light by driving a transmissive liquid crystal display segment installed in the finder.

When the high-definition size is basically used, in panoramic photography, the print screen is changed from the high-definition size to the panoramic size by enlarging and printing the upper and lower ends of the film in a light-shielded manner. In shooting with a 35 mm size), normally, the print screen is changed from the high-definition size to the normal size by enlarging and printing by shielding both ends of the film in the left-right direction.

The photometric means 75 measures the brightness of the object by a light receiving element (not shown). The obtained information (photometric information) is input to the control means 10 to obtain an appropriate exposure amount. Based on the photometric information from 75, exposure calculation is performed in the calculation unit, and the aperture value (F number) and shutter speed are determined accordingly.

The distance measuring means 74 measures the distance information from the camera 1A to the object or the amount of defocus (defocus amount) with respect to the planned focal plane (film surface) in the camera 1A by, for example, a passive method. The obtained information (distance measurement information) is input to the control means 10.

The diaphragm driving means 24 has a motor for driving the diaphragm. As described above, when the brightness information of the subject is input from the photometry means 75 to the control means 10, the control means 10 performs an exposure calculation based on the brightness information to determine an appropriate aperture value and shutter speed. Then, a command signal for setting the diaphragm to the proper diaphragm value is input to the diaphragm driving means 24. The diaphragm driving unit 24 drives the diaphragm by rotating the diaphragm driving motor by a predetermined amount in response to this command.

The focus driving means 25 has a motor for driving a focusing point. As described above, the distance measuring means 74
When the distance measurement information is input to the control means 10 from the control means 10, the control means 10 inputs a command signal for focusing to the focus driving means 25 based on the distance measurement information. The focus drive means 25 drives the focusing drive motor by a predetermined amount in response to this focusing command, drives the focusing lens of the photographing optical system 30, and obtains the focused state. From the zoom cord contact piece 85, the cam plate 4 to the camera body 2
Signal corresponding to position 3 (eg, trimming magnification S)
Is input to the control means 10.

As shown in FIG. 3, in the cartridge loading section 27 of the camera 1A, the DX code provided on the cartridge P, that is, the DX code carrying the film information such as the ISO sensitivity of the film, is read from the ISO sensitivity information. An ISO sensitivity detecting means 17 for reading is provided. The ISO sensitivity detecting means 17 includes a plurality of contact points 17 in the form of protrusions.
1 is biased toward the inside of the cartridge loading section 27 by the coil springs 172, and is arranged along the vertical direction (width direction) of the film 100.

When the cartridge P is loaded in the cartridge loading section 27 of the camera 1A, D provided on the cartridge P is loaded.
Each contact 171 of the ISO sensitivity detecting means 17 comes into contact with the X code, and according to the pattern of conduction and non-conduction of the DX code,
A signal corresponding to the ISO sensitivity of the film 100 is input to the control means 10 and the ISO sensitivity is read.

The contacts of the mode selection button 77 shown in FIG. 1 are electrically connected to the desired print size input means 18 and the allowable particle size input means 14, and by operating this mode selection button 77, it will be described later. A desired print size (printing paper size), an allowable particle size, etc. can be input.

From the desired print size input means 18,
The print size (print paper size) desired by the photographer, for example, service size, cabinet size, 6 or 4 cut,
Signals corresponding to half-cut and full-sheet are input to the control means 10.

The permissible particle size input means 14 is means for inputting the permissible range (permissible particle size) of the silver particle size of the printed image when the film 100 is printed on the photographic paper 110. Allowable particle size input means 1
From 4, a signal corresponding to the allowable particle size γ _max determined by the photographer is input to the control means 10, and this allowable particle size γ _max is used for creating image quality information as described later.

The photographing optical system detecting means 19 includes the photographing optical system 3
It is a means for detecting a focal length of 0, an aperture value, and the like. For example, in the case of automatic exposure with aperture priority or manual exposure, a signal corresponding to the aperture value is sent to the control means 10 from the photographing optical system detection means 19. Is entered.

The film running control means 21 controls the film 1
At the time of feeding and winding 00, the film running motor 13 is driven to run the film. A signal indicating the traveling (winding) of the film 100 is input from the film traveling detection means 16 to the control means 10. And the control means 1
0 is based on the signal indicating the running of the film 100,
When the film is running, a recording signal is input to the information recording control means 23. Further, the control means 10 inputs a stop signal to the film running control means 21, and the film running control means 21 at the prescribed position on the basis of this stop signal.
00 is stopped.

When the recording signal is inputted from the control means 10, the information recording control means 23 causes the magnetic head 12 to move to the magnetic track 101 of the running film 100.
Various information such as trimming magnification S, print screen format, desired print size, and image quality information is recorded.

The notification control means 22 drives the sounding means 76, and the sounding means 76 notifies the image quality information by sound such as voice or buzzer. In this case, the voice,
The degree of image quality is informed by the strength of sound, pitch of sound, cycle of sound, and the like.

Further, the notification control means 22 drives the LCD 6 for finder display and the LCD 5 for external display, respectively, and notifies the image quality information and the trimming magnification S by the LCD 6 and LCD 5, respectively. In this case, as described above, the number of displayed stars (0, 1,
2, 3) indicate the degree of image quality. Further, the trimming magnification S is read based on the signals input from the code plate 81 and the code contact piece 85, and the read trimming magnification S is displayed. The sounding means 7
6, the LCD 6 for displaying in the finder and the LCD 5 for displaying externally constitute the informing means.

Next, the operation of the camera 1A during zooming will be described. [Zooming from the wide-angle side to the telephoto side] When the photographer displaces the zoom lever 72 to the telephoto side, the telephoto side zoom switch 72a is turned on, and the zoom motor 11 is rotationally driven clockwise in FIG. As a result, the pinion gear 91 rotates counterclockwise in FIG. 2 and at a reduced speed through the gears of the speed change mechanism 9, and the rack gear 433 and the pinion gear 91 are rotated.
The rotational motion of the pinion gear 91 is converted into a linear motion of the cam plate 43 by and the cam plate 43 moves to the left side in FIG.

When the cam plate 43 moves, the second variable magnification optical system lens 42 of the finder optical system 4 is moved along the optical axis 45 of the finder optical system 4 in FIG. 2 by the cam groove 431 and the projection 421. Front (first variable magnification optical system lens 4
1) toward the telephoto side.

At the wide-angle end 461, the film 10
0 corresponds to the screen area corresponding to the print screen format of the upper screen and the actual field of view viewed by the finder optical system 4. Therefore, the trimming magnification S = 1 is set to the magnetic track 101 via the magnetic head 12. And is printed at the trimming magnification S = 1 at the time of printing.

On the other hand, except for the wide-angle end 461, the film 1
The screen area corresponding to the print screen format of the screen on screen 00 does not correspond to the actual view screen visually recognized by the finder optical system 4. Therefore, the finder optical system 4
The trimming magnification S (> 1) is recorded on the magnetic track 101 via the magnetic head 12 as the trimming information for specifying the screen area on the film 100 corresponding to the real-field-of-view screen that is visually recognized at. Based on this, trimming is performed at the time of printing. The trimmed print image and the viewfinder image correspond to each other.

Further, during this zooming, as described above, the zoom code plate 81 and the zoom code contact piece 85 are used.
The trimming magnification S is read based on a signal input from the LCD, and the read trimming magnification S is displayed by the LCD 6 for display inside the finder and the LCD 5 for external display.

[Zooming from the telephoto side to the wide-angle side] When the photographer displaces the zoom lever 72 to the wide-angle side, the wide-angle side zoom switch 72b is turned on, and the zoom motor 11 is driven to rotate in the opposite direction to the above. As a result, the pinion gear 91 rotates in the clockwise direction in FIG. 2 and at a reduced speed through the gears of the speed change mechanism 9, and the rack gear 433 and the pinion gear 91 rotate the pinion gear 91 into a linear motion of the cam plate 43. After being converted, the cam plate 43 moves to the right side in FIG.

When the cam plate 43 moves, the second variable-magnification optical system lens 42 of the finder optical system 4 is moved along the optical axis 45 of the finder optical system 4 in FIG. 2 by the cam groove 431 and the projection 421. Rear (first variable magnification optical system lens 4
It moves to a direction in which the distance between the first and second variable power optical system lenses 42 increases, that is, to the wide angle side.

Here, similarly to the above, the trimming magnification S = 1 at the wide-angle end 461 and the predetermined trimming magnification S (> 1) except the wide-angle end 461 are recorded on the magnetic track 101 via the magnetic head 12. Printing is performed based on the trimming magnification S. Further, similarly to the above, the trimming magnification S is displayed by the LCD 6 for displaying in the finder and the LCD 5 for displaying externally.

Next, the operation of the control means 10 at the time of creating and displaying the image quality information will be described. The control means (image quality information creating means) 10 uses the trimming magnification S ₁ (≧
1), based on the ISO speed of the film 100, the print screen format, and the desired print size, the silver particle size (particle size) γ of the print image when printed from the film 100 onto the photographic paper 110 is calculated, and this particle size is calculated. Whether γ is included in the allowable range of the silver particle size input from the allowable particle size input means 14, that is, the allowable particle size (γ _max ) ≧ the particle size (γ)
It is determined whether or not the sounding means 76, the LCD 6 for displaying in the finder and the LCD 5 for displaying externally (notifying means).
Makes a notification based on this judgment result.

Further, in order to inform the degree of image quality of the print image in more detail, when the particle size γ is not within the allowable range of the silver particle size input from the allowable particle size input means 14, that is, γ _max < In the case of γ, the value (γ / α) obtained by dividing the particle size (γ) by a value (α) larger than 1 is within the allowable range of the silver particle size input from the allowable particle size input means 14. Whether or not it is included, that is, whether or not γ _max ≧ γ / α is determined, and based on the result of this determination, the notification is given. Hereinafter, a specific description will be given.

FIG. 10 is a flow chart showing the operation of the control means 10 when creating and displaying the image quality information. Hereinafter, description will be given based on this flowchart.
When the photometric distance measuring switch 71a is turned on, the ISO sensitivity of the film 100 is read by the ISO sensitivity detecting means 17 (step 501).

Next, the print screen format is read (step 502). Next, the desired print size is read (step 503). Then, the trimming magnification S ₁ is read (step 504).

Next, based on the ISO speed of the film 100, the print screen format, the desired print size and the trimming magnification S ₁ , the silver particle size (particle size) γ of the print image when printed from the film 100 to the photographic paper 110. Is calculated (step 505).

Here, as shown in Table 1, Table 2 and Table 3 below, the ISO sensitivity, print screen format and desired print size correspond to the coefficients γ ₁ , γ ₂ and γ ₃ , respectively. The particle size γ is calculated using these coefficients. This tabulated information is stored in advance in a memory (not shown) of the control means 10.

[0071]

[Table 1]

[0072]

[Table 2]

[0073]

[Table 3]

The control means 10 controls the read ISO sensitivity,
Coefficient gamma ₁ corresponding to the print screen format and desired print size, the gamma ₂ and gamma _3, respectively, read from the memory, each coefficient gamma _1, gamma ₂ and gamma
_The particle size γ is calculated by substituting ₃ and the read trimming magnification S ₁ into the following equation (1). γ = γ ₁ × γ ₂ × γ ₃ × S ₁ (1)

For example, when the ISO sensitivity is ISO 100, the print screen format is the panoramic size, the desired print size is the cabinet size, and the trimming magnification S ₁ is 2 times, γ ₁ = 1.2, γ ₂ = 1.5, γ ₃ = 2, S ₁
= 2 is substituted into the above formula (1), and it is calculated. The results are as follows. γ = γ ₁ × γ ₂ × γ ₃ × S ₁ = 1.2 × 1.5 × 2 × 2 = 7.2

Next, the permissible particle size γ _max input in advance by the photographer is read, and it is determined whether γ _max ≧ γ (step 506). For example, if γ _max = 9, then γ _max > γ, so “Y” is selected in step 506.

If γ _max ≧ γ is determined in step 506, no warning is given. That is, the sound producing means 7
6 does not emit a buzzer sound and is an LCD for display in the viewfinder
The LCD 6 and the LCD 5 for external display are in a standby state waiting for the release switch 71b to be turned on without displaying a star mark.

In step 506, γ _max <γ
If it is determined that γ _max ≧ γ / 1.5, it is determined (step 507). Γ in step 507
If it is determined that _max ≧ γ / 1.5, a warning of level 1 indicating that the image quality is the best, out of warnings of three levels of levels 1, 2, and 3 is issued (step 508). That is, the sounding means 76 emits a small buzzer sound of large, medium and small, and the LCD 6 for displaying in the finder and the LCD 5 for displaying externally each display one star.

In step 507, γ _max <γ
If it is determined that /1.5 is, γ _{ma x} ≧ γ / 2 determines whether or not (step 509). If it is determined in step 509 that γ _max ≧ γ / 2, a warning of level 2 indicating intermediate image quality among levels 1 to 3 is issued (step 5).
10). That is, the sounding means 76 emits a middle buzzer sound, and the LCD 6 for display in the finder and the LCD 5 for external display respectively display two star marks.

In step 509, γ _max <γ
If it is determined to be / 2, a warning of level 3 indicating that the image quality is the worst out of levels 1 to 3 is issued (step 51).
1). That is, the sounding means 76 emits a large buzzer sound, and the LCD 6 for in-viewfinder display and the LCD 5 for external display each display three star marks.

After the step 508, 510 or 511, the standby state is waited for the release switch 71b to be turned on. This is the end of this program. Although the photographer inputs the allowable particle size γ _max in this camera 1A, the allowable particle size γ _max may be set in advance at the time of factory shipment.

As described above, according to the camera 1A of the present invention, the image quality information indicating the quality level of the print image when the film 100 is printed on the photographic paper 110, the sound generating means 76, the LCD 6 for displaying in the finder. And the LCD 5 for external display, respectively.
The photographer can perceive the degree of image quality according to the particle size of the print image by hearing or sight.

Therefore, the photographer can check the image quality of the print image in advance before taking the picture, so that it is possible to prevent the photograph of the poor image quality from being taken. For example, when it is notified that the image quality is poor, the photographer needs to know the trimming magnification S, the film type (sensitivity), the print screen format, the desired print size, the exposure (aperture), and the distance from the camera 1A to the subject. The image quality can be improved by changing the focal length of the photographing optical system 30 and the like, and it is possible to confirm that the image quality is good by the sounding means 76, the LCD 6 for display in the finder and the LCD 5 for external display, and then shoot. This makes it possible to obtain a high-quality photograph (print image).

In particular, when zooming (pseudo zooming) by the trimming zoom means is performed, the image in the trimming area is enlarged at the time of printing, so that the image quality fluctuates greatly. Therefore, if zooming is performed randomly, the telephoto side will appear. Although the image quality may be extremely deteriorated due to excessive zooming, the camera 1A of the present invention can confirm the image quality level of the print image before the image is taken, so that it is possible to prevent the taking of a photograph with poor image quality. be able to.

Further, in this embodiment, since the image quality information is created using the particle size and the image quality information is notified,
The photographer can use the image quality information as a guide when intentionally taking a coarse-grained photograph.

Since the image quality information is magnetically recorded on the magnetic track 101 of the film 100 by the magnetic head 12, the image quality information can be used when the image is printed from the film 100 onto the photographic paper 110. For example, when it is recorded that the image quality of the print image is poor, the image quality can be improved by printing as it is or by changing the final enlargement magnification (trimming magnification S, print screen format, photographic paper size, etc.). Whether to print or not can be selected, and when changing the enlargement magnification, a print image with high image quality can be obtained.

Next, recording of trimming information and image quality information at the time of shooting and trimming at the time of printing will be described. As described above, when the first step of the release switch 71 is turned on, the photometric means 75 and the distance measuring means 76 are respectively activated, and when the second step of the release switch 71 is turned on, the shutter is driven by the shutter drive means 26. Then, shooting is performed.

When the photographing is completed, the film 100 is set to 1
It is wound up by a frame. Then, the trimming magnification S and other information relating to the photographed image, which is detected in advance by the zoom code plate 81 and the zoom code contact piece 85, is recorded on the magnetic track 101 of the film 100 by the magnetic head 12 during the film traveling. To be done.

When the film 100 is taken out from the loading section of the camera 1A and developed, and when printing is performed from the film 100 onto the photographic paper, the predetermined information reading device prints from the magnetic track 101 of the film 100. Each information such as a print screen format, a desired print size (printing paper size), a trimming magnification S, and image quality information relating to the image to be read is read. Then, based on the read information, the printing paper is selected from service size, cabinet size, 6-cut, 4-cut, half-cut, all-paper, and the like.

Next, the developed film 100 and the printing paper are set in a predetermined printing device, and trimming and printing are performed according to the read print screen format and the trimming magnification S.

Specifically, as shown in FIG. 8, a film corresponding to an actual view screen (shown by a dotted line) visually recognized by the finder optical system 4 among the frames (shooting screen) 103 of the developed film 100. Screen area 104 on 100
The image is enlarged based on the trimming magnification S and printed on the screen 111 of the photographic printing paper 110.

In this case, the center of the frame 103 of the film 100 and the center of the screen area 104 on the film 100 corresponding to the actual field of view viewed by the finder optical system 4 coincide with each other, so that the trimming magnification is increased. From only S, the screen area 104 on the film 100 corresponding to the actual view screen visually recognized by the finder optical system 4 can be specified.

Next, a second embodiment of the camera of the present invention will be described. FIG. 11 is a block diagram showing a second embodiment of the camera of the present invention. Hereinafter, description of the common points with the above-described camera 1A will be omitted, and the different points will be described. Camera 1
The structure of B is the same as that of the camera 1A shown in FIGS. 1 to 7, and the circuit configuration of the camera 1B is replaced by the allowable particle size input means 14 of the camera 1A as shown in FIG.
The camera is the same as the camera 1A except that the permissible circle of confusion input means 15 is provided.

The contact points of the mode selection button 77 are the desired print size input means 18 and the permissible circle of confusion input means 15.
The mode selection button 77
By operating, the desired print size (printing paper size), the size of the permissible circle of confusion, and the like can be input.

The permissible circle of confusion input means 15 is used for the film 10
This is a means for inputting the size (diameter) of the permissible circle of confusion in the print image when printed from 0 to the photographic paper 110. From the permissible circle of confusion input means 15, a signal corresponding to the diameter δ _max of the permissible circle of confusion determined by the photographer is input to the control means 10, and the permissible circle of confusion diameter δ _max is stored in the image quality information as will be described later. Used for creation.

Next, the operation of the control means 10 when creating and displaying the image quality information will be described. The control means (image quality information creation means) 10 uses the trimming magnification S ₂ (≧
1) Based on the diameter δ ₀ of the permissible circle of confusion on the film 100, the print screen format, the desired print size, and the exposure information (for example, F number), the film 10
The diameter δ of the circle of confusion in the print image when printed from 0 to the photographic paper 110 is calculated, and the diameter of the circle of confusion δ
Is less than or equal to the diameter δ _max of the permissible circle of confusion input from the permissible circle of confusion input means 15, that is, whether the permissible circle of confusion diameter (δ _max ) ≧ the circle of confusion (δ), The sounding means 76, the LCD 6 for displaying in the finder, and the LCD 5 (notifying means) for displaying externally make the notification based on the result of this judgment.

The "circle of confusion" means a circle of a blur of an image of an object point by an optical system. The smaller the diameter of this circle of confusion, the sharper the focus is recognized with the naked eye, and the diameter is not so large. When it gets bigger, it becomes out of focus. A circle having a critical diameter between this blur and sharpness is called the "allowable circle of confusion".

Further, in order to inform the degree of image quality of the printed image in more detail, when δ _max <δ, a value (β) obtained by further decrementing the circle of confusion (δ) by a value (β) larger than 1 ( δ / β) is less than or equal to the permissible circle of confusion circle (δ _max ) input from the permissible circle of confusion input means 15, that is, δ _max
It is determined whether or not ≧ δ / β, and the notification is given based on the determination result. Hereinafter, a specific description will be given.

FIG. 12 is a flow chart showing the operation of the control means 10 when creating and displaying the image quality information. Hereinafter, description will be given based on this flowchart.
When the photometric distance measuring switch 71a is turned on, the photometric means 75 is activated (step 601).

Next, an exposure calculation is performed based on the photometric information from the photometric means 75, whereby the shutter speed and F
The number (F value) F is calculated (step 602). Next, the print screen format is read (step 603). Next, the desired print size is read (step 604). Then, the trimming magnification S ₂ is read (step 605).

Next, the permissible circle of confusion diameter δ ₀ on the film 100, the open F value F _{0 of} the photographing optical system 30, and the photographing optical system 30.
Film 1 based on the F value F, print screen format, desired print size and trimming ratio S _2.
The confusion circle diameter δ in the print image when printed on the printing paper 110 from 00 is obtained (step 606).

Here, as shown in Tables 4 and 5 below, the print screen format and the desired print size correspond to the coefficients δ ₁ and δ ₂ , respectively. Calculate δ. This tabulated information is stored in advance in a memory (not shown) of the control means 10.

[0103]

[Table 4]

[0104]

[Table 5]

The control means 10 reads out the coefficients δ ₁ and δ ₂ corresponding to the read print screen format and desired print size from the memory, respectively, and the respective coefficients δ ₁ and δ ₂ and the read trimming magnification S. ₂ and the calculated F value (F) are substituted into the following equation (2) to calculate the circle of confusion δ. The permissible circle of confusion diameter δ ₀ on the film 100 in the following formula (2) is set in advance at the time of factory shipment. δ = δ ₀ × (F ₀ / F) × δ ₁ × δ ₂ × S ₂ (2)

For example, the permissible circle of confusion diameter δ ₀ on the film 100 is 35 μm, the open F value F ₀ is 3.5, the F value is 3.5, the print screen format is high definition size, and the desired print size is cabinet size. , When the trimming magnification S ₂ is 1.5 times, δ ₀ = 35 μm, F ₀ =
3.5, F = 3.5, δ ₁ = 1, δ ₂ = 2, S ₂ = 1.
Substituting 5 into the above equation (2), it is calculated. The results are as follows. δ = δ ₀ × (F ₀ / F) × δ ₁ × δ ₂ × S ₂ = 35 μm × (3.5 / 3.5) × 1 × 2 × 1.5 = 105 μm

Next, the permissible circle of confusion diameter δ _max input by the photographer in advance is read, and it is determined whether δ _max ≧ δ (step 607). For example, δ _max = 60μ
If m, then δ _max <δ, so “N” is selected in step 607.

If δ _max ≧ δ is determined in step 607, no warning is given. That is, the sound producing means 7
6 does not emit a buzzer sound and is an LCD for display in the viewfinder
The LCD 6 and the LCD 5 for external display are in a standby state waiting for the release switch 71b to be turned on without displaying a star mark.

In step 607, δ _max <δ
If it is determined that δ _max ≧ δ / 1.5, it is determined (step 608). Where δ / 1.5 = 105
Since /1.5=70, and δ _max <δ / 1.5, “N” is selected in step 608.

At step 608, δ _max ≧ δ / 1.
If it is determined to be 5, the warning of level 1 indicating that the image quality is the best out of the warnings of three stages of levels 1, 2, and 3 is issued (step 609). That is, the sound producing means 7
6 emits a small buzzer sound among large, medium and small, and an LCD 6 for displaying in the finder and an LCD for external displaying
5 displays one star, respectively.

In step 608, δ _max <δ
If it is determined that /1.5 is, δ _{ma x} ≧ δ / 2 determines whether or not (step 610). Where δ / 2 = 105
/2=52.5, and therefore δ _max > δ / 2, so that “Y” is selected in step 610.

If it is determined in step 610 that δ _max ≧ δ / 2, a warning of level 2 showing an intermediate image quality among levels 1 to 3 is issued (step 611). That is, the sounding means 76 emits a middle buzzer sound, and the LCD 6 for display in the finder and the LCD 5 for external display are
Display two stars each.

In step 610, δ _max <δ
If it is determined to be / 2, a warning of level 3 indicating that the image quality is the worst out of levels 1 to 3 is issued (step 61).
2). That is, the sounding means 76 emits a large buzzer sound, and the LCD 6 for in-viewfinder display and the LCD 5 for external display each display three star marks.

After step 609, 611 or 612, the standby state is waited for the release switch 71b to be turned on. This is the end of this program. In this camera 1B, the photographer inputs the permissible circle of confusion diameter δ _max . However, for example, the permissible circle of confusion diameter δ _max may be set in advance at the time of factory shipment. Good.

Further, in this camera 1B, the program automatic exposure is used. However, for example, in the case of the aperture-priority automatic exposure or manual exposure, in this flowchart, the "photometry" operation of step 601 and step 60 are performed.
The "F value calculation" operation No. 2 is omitted, and the F value preset by the photographer is input.

As described above, according to the camera 1B, the image quality information created on the basis of the circle of confusion is notified, whereby the degree of the image quality related to the out-of-focus of the print image (whether it is within the permissible range in which no out-of-focus occurs). Etc.) can be sensed, so that it is possible to prevent photography of poor quality images from being taken, as in the case of the camera 1A described above.

The camera of the present invention has been described above based on the illustrated configuration example, but the present invention is not limited to this. For example, in the present invention, the image quality information includes trimming information (trimming magnification S) and the sensitivity of the film 100 (IS
O sensitivity), print screen format (high-definition size, 35 mm size, panorama size, etc.), print size desired by the photographer (service size, cabinet size, 6-cut, 4-cut, half-cut and all paper, etc.), exposure information (aperture, etc.) ), Based on at least one information of the distance from the camera to the subject and the focal length of the photographing optical system 30, for example, it is created in the same manner as each of the above-described embodiments.

Further, in the present invention, the trimming zoom means 1a and the magnetic head (recording means) 12 may be omitted. In this case, the image quality information includes the sensitivity of the film 100 (ISO sensitivity), the print screen format (high-definition size, 35 mm size, panoramic size, etc.), and the print size desired by the photographer (service size, cabinet size, 6 cuts, 4 cuts). , Half-cut and all-paper, etc.), exposure information (aperture, etc.), the distance from the camera to the subject, and the focal length of the photographing optical system 30. To be done.

[0119]

As described above, according to the camera of the present invention, since the image quality information indicating the image quality of the print image when the film is printed on the photographic paper is notified by the notifying means, the photographing is performed. The person can perceive the degree of the image quality.

Therefore, the photographer can confirm the image quality of the print image in advance before taking the photograph, so that it is possible to prevent the photograph of the poor image quality from being taken. For example, when it is notified that the image quality is poor, the photographer needs to adjust the trimming magnification S, the film type (sensitivity), the print screen format, the desired print size, the exposure (aperture), the distance from the camera to the subject, and the like. It is possible to improve the image quality by changing the focal length of the photographing optical system and confirm that the image quality is good by the notifying means before taking a picture, thereby obtaining a photograph (printed image) with good image quality.

In particular, when zooming (pseudo zooming) by the trimming zoom means is performed, the image in the trimming area is enlarged at the time of printing, so that the image quality fluctuates greatly. Therefore, if zooming is performed randomly, the telephoto side will appear. Although the image quality may be extremely deteriorated due to excessive zooming, the camera according to the present invention can confirm the image quality level of the print image before shooting, and thus it is possible to prevent photography of a poor quality image. You can

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration example of a camera of the present invention.

FIG. 2 is a perspective view showing a configuration example of trimming zoom means in the present invention.

FIG. 3 is a partial cross-sectional view showing a configuration example of a camera of the present invention.

FIG. 4 is a view showing the inside of a viewfinder of the camera of the present invention.

FIG. 5 is a diagram showing the inside of a viewfinder of the camera of the present invention.

FIG. 6 is a plan view showing a display example of an LCD for external display in the present invention.

FIG. 7 is a plan view showing a display example of an LCD for external display in the present invention.

FIG. 8 is a schematic diagram showing the correspondence between the screen area on the film and the screen on the photographic paper in the present invention.

FIG. 9 is a block diagram showing a circuit configuration example of a camera of the present invention.

FIG. 10 is a flowchart showing the operation of the control means when creating and displaying image quality information in the present invention.

FIG. 11 is a block diagram showing a circuit configuration example of a camera of a second embodiment of the present invention.

FIG. 12 is a flowchart showing the operation of the control means when creating and displaying image quality information in the second embodiment of the present invention.

[Explanation of symbols]

 1A, 1B Camera 1a Trimming zoom means 2 Camera body 30 Photographing optical system 31 Lens barrel 4 Viewfinder optical system 41 First variable-magnification optical system lens 42 Second variable-magnification optical system lens 421 Protrusion 43 Cam plate 431 Cam groove 432 Guide Groove 433 Rack gear 441, 442 Protrusion 45 Optical axis 461 Wide-angle end 462 Telephoto end 5 LCD for external display 51 Star symbol 52 “Number” “・” “×” symbol 6 LCD for viewfinder display 60 Display area 61 Star symbol 62 “Number” “・” “×” symbol 63, 64, 65 Viewfinder screen 71 Release switch 71a Release switch 71b Photometric distance measuring switch 72 Zoom lever 72a Telephoto side zoom switch 72b Wide angle side zoom switch 73 Print screen format selection switch 74 Distance measuring Means 75 photometric hand 76 Sounding means 77 Mode selection button 81 Zoom code plate 85 Zoom code contact piece 9 Transmission mechanism 91 Pinion gear 10 Control means 11 Zoom motor 12 Magnetic head 13 Film traveling motor 14 Allowable particle size input means 15 Allowable confusion circle input means 16 Film running detection Means 17 ISO sensitivity detection means 171 Contact point 172 Coil spring 18 Desired print size input means 19 Photographing optical system detection means 20 Zoom control means 21 Film running control means 22 Notification control means 23 Information recording control means 24 Aperture drive means 25 Focus drive means 26 Shutter Drive means 27 Patrone loading section 28 Spool 100 Film 101 Magnetic track 102 Perforation 103 Frame 104 Screen area 110 Printing paper 111 Screen 501-511 screen -Up 601 to 612 step P cartridge P1 film winding shaft

Claims (7)

[Claims] 1. An image pickup optical system for forming an image of a subject on a film surface, an image quality information creating unit for creating image quality information indicating a degree of image quality of a print image when printed on a photographic paper from the film, and the image quality. A camera having a notifying unit for notifying information. 2. The image quality information is at least one of a film sensitivity, a print screen format, a print size desired by a photographer, exposure information, a distance from a camera to a subject, and a focal length of the photographing optical system. The camera according to claim 1, which is determined based on 3. A finder optical system having a photographing optical system for forming a subject image on a film surface and a finder optical system capable of changing the magnification, wherein zooming is performed by changing the magnification of the finder optical system. It is a camera that obtains a pseudo telephoto effect by printing the screen area on the film corresponding to the actual field of view on the photographic paper, and the image quality of the print image when printed from the film to the photographic paper The image quality information creating unit that creates the image quality information indicating the degree and the reporting unit that reports the image quality information are provided, and the image quality information created by the image quality information creating unit is configured to be reported by the reporting unit. A camera characterized by. 4. The camera according to claim 3, further comprising recording means for recording trimming information for specifying a screen area on the film corresponding to an actual view screen viewed by the finder optical system. 5. The camera according to claim 4, wherein the recording means is capable of recording the image quality information created by the image quality information creating means. 6. The image quality information includes trimming information for identifying a screen area on the film corresponding to an actual view screen visually recognized by the finder optical system, film sensitivity, print screen format, and print size desired by a photographer. The camera according to any one of claims 3 to 5, which is determined based on at least one of information on exposure information, a distance from a camera to a subject, and a focal length of the photographing optical system. 7. The camera according to claim 1, wherein the notification is performed at the time of shooting.