JP2000244779A - Electronic camera device and electronic camera system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a using feeling without the need of making a photographer image what degree of a focus length it is equivalent to in a silver camera from a displayed focus length. SOLUTION: An exchange lens 20 is provided with a zoom encoder 23 for recognizing the value of a set focus length and a camera main body 10 is provided with an arithmetic means 11 for receiving the value of the focus length from the zoom encoder 23 and converting the received value of the focus length to the focus length in a camera system using a silver film and a display means 15 for displaying the focus length converted in the arithmetic means 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic camera device and an electronic camera system to which a lens is detachable.

[0002]

2. Description of the Related Art In recent years, in response to demands for higher functionality and a wider range of product settings for electronic camera devices, 35 m has been developed.
Various system configurations of an electronic camera device capable of sharing an interchangeable lens for a single-lens reflex camera system of an m-silver film and various accessories have been considered.

Since the size of a CCD as an image pickup device used in an electronic camera device differs for each model, a plurality of models using CCDs of different sizes have a single lens reflex camera of a 35 mm silver halide film. Even if an interchangeable lens having the same focal length for a camera system is mounted as it is, the focal length of a 35 mm-format converted lens of an actually obtained image is different due to the difference in the obtained angle of view.

Accordingly, compared to a 35 mm silver halide film camera which is widely used and many of which have mastered the operation, in an electronic camera device having a short history, the focal length of the lens is converted into a 35 mm format lens for each model. The fact is that the numerical value corresponding to the focal length is displayed in the catalog.

[0005] Therefore, photographers of many electronic camera devices which have acquired the photographing technique with a 35 mm silver halide film camera system to a certain extent have found that the focal length of the lens used at that time is the focal length of a 35 mm format equivalent lens. In many cases, photographing is performed while always imagining how much the camera corresponds to the camera. In particular, when the camera is frequently replaced with an electronic camera device in which a 35 mm interchangeable lens can be mounted as it is, or when a plurality of types of electronic camera devices are used. For example, the image of the photographer may be confused when using in combination.

[0006]

As described above, since the angle of view is different between the silver halide film camera device and the electronic camera device, the focal length set for the interchangeable lens mounted on the electronic camera device and the focal length Since the converted value is different from the value obtained by converting the distance to a silver halide film camera, photographers who are proficient in the operation of the silver halide film camera can adjust the focal length of the lens displayed on the electronic camera device to what degree of focal length with the silver halide camera. It is necessary to take an image of whether the image is equivalent or not, and there is a problem that the usability of the photographer is significantly impaired.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic camera device which can improve the usability without requiring the photographer to imagine how much the focal length corresponds to the silver halide camera from the displayed focal length. It is in.

[0008]

Means for Solving the Problems The present invention is configured as follows to achieve the above object.

(1) The present invention (claim 1) provides an arithmetic unit for converting the value of the focal length of a lens into a focal length in a camera system using a silver halide film, and a focal point converted by the arithmetic unit. Display means for displaying the distance.

[0010] The apparatus may further comprise mode switching means for switching between a mode in which the focal length converted by the arithmetic means is displayed on the display means and a mode in which the focal length of the lens is directly displayed on the display means. preferable.

In an electronic camera device capable of mounting an interchangeable lens used in a silver halide film camera system, a storage unit for storing the size of the angle of view of the image pickup device and the size of the angle of view of the silver halide film camera is mounted. A camera using a silver halide film, based on the focal length value set for the interchangeable lens and the two angles of view stored in the storage unit. It is preferable to include a calculating means for converting into a focal length in the system, and a display means for displaying the focal length converted by the calculating means.

(2) According to a third aspect of the present invention, in an electronic camera system including an interchangeable lens and an electronic camera device to which the interchangeable lens can be mounted, the interchangeable lens has a focal point for recognizing a value of a focal length. The electronic camera device includes a distance recognizing unit, and the electronic camera device receives the focal length value from the focal length recognizing unit, and converts the received focal length value into a focal length in a camera system using a silver halide film. Means, and display means for displaying the focal length converted by the calculation means.

The calculating means calculates the value of the focal length as L _n / C
_The converted value is obtained by multiplying _n . Note that L _n
Diagonal, C _n of the image which the image passing through the lens is focused on the film plane is the magnitude of the diagonal of the photosensitive area of the image sensor of an electronic camera device.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram illustrating a schematic configuration of an electronic camera device according to an embodiment of the present invention. In FIG. 1A, an interchangeable lens 20 is mounted on a camera body 10. Calculation means 11 of camera body 10
The imaging device 12 captures an image incident from a lens with an imaging device and converts it into digital data. The recording device 13 stores the captured image data. The ROM 14 stores a program and the angle of view of the imaging device. EVF (Electric Vie) for displaying images, setting items and the like incident on the means 12
w Finder) and a display means 15 including a liquid crystal display.
The focal length set to 0 is displayed as it is (Normal mode) or the converted value for 35 mm film is displayed (35
display mode setting means 16 for setting (mm conversion mode)
Is connected.

In the interchangeable lens 20 of the zoom type, an arithmetic unit 21 stores information such as the type of the lens.
An OM 22 and a zoom encoder 23 for calculating a set focal length are connected. In addition, as an interchangeable lens used for a silver halide film camera, for example, 35 mm
Lens for APS (Advanced Photo System) film.

In the case of the single focus type interchangeable lens 20, a type in which a ROM 22 in which information such as the type of lens is stored is connected to an arithmetic means 21 (FIG. 1B), and no arithmetic means is built in There is a type (FIG. 1C) in which only the ROM 22 is incorporated.

The arithmetic means 11 in the camera body 10 and the arithmetic means 21 (or ROM 22) in the interchangeable lens 20 are connected, and can exchange signal information with each other.
The value of the focal length set in the camera body 10 can be transmitted from the interchangeable lens 20. The information sent from the interchangeable lens 20 to the camera body 10 may include, in addition to the focal length information, system information indicating whether the lens is a 35 mm lens or an APS lens.

As a combination of the camera body and the interchangeable lens system, when an electronic camera apparatus having a mount for a 35 mm silver halide camera lens is mounted with an interchangeable lens for 35 mm, an electronic camera having a mount for an APS camera lens is used. When an APS interchangeable lens is attached to a camera device, an APS lens or an APS interchangeable lens may be attached to an electronic camera device having a mount for a 35 mm silver halide camera lens or an APS camera via an adapter. The size of the CCD used in the electronic camera device is 1 / 2.7 inch, 1/2 inch, 2 inch.
/ 3 inch and APS size.

Next, the case where the focal length is displayed on the display means will be described with reference to the flowchart of FIG.

First, the arithmetic means 11 in the camera body 10
Acquires the value of the focal length set for the lens 20 from the zoom encoder 23 of the interchangeable lens 20 via the calculating means 21 (step S1).

Next, the calculating means 11 is a display mode setting means 16 for setting the display mode to the 35 mm conversion mode or the Norm mode.
It is referred to which of the al modes has been set (step S2). If the mode is set to the Normal mode, the arithmetic unit 11 instructs the display unit 15 to display the value of the focal length received from the interchangeable lens 20 (Step S).
3). For example, when the set focal length is 50 mm, as shown in FIG.
50 mm is displayed on the VF 31 or the like.

If the display mode is the 35 mm conversion mode in step S2, the calculating means 11 converts the value of the focal length received from the interchangeable lens 20 into the value of a 35 mm silver halide film camera (step S4). Converted value is obtained by multiplying the constants L _n / C _n to the focal length of the interchangeable lens 20. Incidentally, L _n is the size of the angle of view of Ginshioshiki camera, it is C _n is the magnitude of the angle of view of the imaging device of the electronic camera device.

As described above, the interchangeable lens system includes a lens for a 35 mm silver halide film and an APS
There is a lens for film. Table 1 shows the size of the camera film for 35 mm silver halide film and APS film.
Shown in

[0024]

[Table 1]

The size of the image pickup device in the image pickup means 15 includes APS, ／ inch, and イ ン チ inch. Table 2 shows the sizes of the APS, イ ン チ inch and イ ン チ inch size image sensors.

[0026]

[Table 2]

Therefore, when the interchangeable lens is for 35 mm film and the image sensor is of APS size, L _n = 43.3, C
_{Since n} = 34.5, L _n / C _n = 1.25. And the focal length obtained from the interchangeable lens is 28 m
m, the conversion value is 28 (mm) × 1.25 = 3
5 (mm).

When the interchangeable lens is for an APS camera and the image sensor is 2/3 inch, L _n = 34.5, C
since it is _n = 11.0, the L _n / C _n = 3.13. And the focal length obtained from the interchangeable lens is 25 m
m, the conversion value is 25 (mm) × 3.136 =
78.4 (mm).

After calculating the converted value, the arithmetic means 11 instructs the display means 15 to display the converted value (step S5). For example, when the converted value is 70 mm, as shown in FIG.
“70 mm” is displayed on 31 or the like. Note that “(35)” is displayed beside the converted value to notify that the value is a converted value.

According to the present embodiment, the angle of view or focal length of the attached lens can be displayed in a converted value corresponding to the silver halide film, so that the photographer's feeling of use can be improved.

The present invention is not limited to the above embodiment, but can be implemented with various modifications without departing from the spirit of the invention.

[0032]

As described above, according to the present invention, the photographer converts the focal length set for the lens into the focal length of the silver halide camera and displays the converted focal length. It is not necessary to imagine whether the focal length corresponds to a certain degree, and it is possible to improve the usability of the photographer.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of an electronic camera device according to an embodiment of the present invention.

FIG. 2 is a flowchart of a procedure for displaying a focal length on a display unit in the electronic camera device of FIG. 1;

FIG. 3 is a diagram showing a state in which a focal length is displayed on an EVF of the electronic camera device of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Camera main body 11 ... Calculation means 12 ... Imaging means 13 ... Recording means 14 ... ROM 15 ... Display means 16 ... Display mode setting means 20 ... Interchangeable lens 21 ... Calculation means 22 ... ROM 23 ... Zoom encoder 31 ... EVF

Claims (3)

[Claims] An arithmetic unit for converting a value of a focal length of a lens into a focal length in a camera system using a silver halide film, and a display unit for displaying the focal length converted by the arithmetic unit. An electronic camera device comprising: And a mode switching means for switching between a mode in which the focal length converted by the arithmetic means is displayed on the display means and a mode in which the focal length of the lens is directly displayed on the display means. The electronic camera device according to claim 1, wherein: 3. An electronic camera system including an interchangeable lens and an electronic camera device to which the interchangeable lens can be mounted, wherein the interchangeable lens includes a focal length recognizing means for recognizing a value of a focal length. The apparatus receives a focal length value from the focal length recognizing unit, and converts the received focal length value into a focal length in a camera system using a silver halide film. An electronic camera system, comprising: display means for displaying the focal length.