JP2004094156A - Camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera equipped with a lighting means for reducing a parallax between a finder and an imaging lens as a camera other than a single-lens reflex camera, specially, an underwater camera. <P>SOLUTION: The camera is a camera usable in water and equipped with a finder which is provided above the imaging lens and has a peep window for viewing a subject and the lighting means which is at a proper position in parallel to the optical axis of the imaging lens and irradiates a part before the imaging lens in parallel to the optical axis of the imaging lens. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a camera, and more particularly, to a camera other than a single-lens reflex camera, provided with an illumination unit for reducing parallax.
[0002]
[Prior art]
2. Description of the Related Art Conventionally known cameras have a finder at an upper position of an imaging lens for photographing a subject.
In such a camera, the subject can be set by looking into the viewfinder and pressing the shutter button to photograph the subject from the imaging lens.
By the way, when the distance to the subject is short, a so-called parallax occurs in which a gap occurs between the subject looking through the viewfinder and the subject actually obtained through the imaging lens.
More specifically, as shown in FIG. 5 (A), when the subject is set slightly upward when looking into the viewfinder, when the subject is captured by an actual imaging lens, the subject is projected downward. Become.
The object shown in FIG. 5B can be taken in such a manner that the subject obtained by looking through the viewfinder is taken downward, and when the subject is taken in from the imaging lens, the subject is taken exactly at the center position.
In the case shown in FIG. 5 (C), when the subject obtained by looking through the viewfinder is positioned right in the center and the subject is taken in from the imaging lens, the image is biased upward.
[0003]
[Problems to be solved by the invention]
However, in the camera described in the related art, parallax in a vertical relation always occurs due to a deviation between the optical axis of the camera and an axis looking into the viewfinder, especially underwater. In particular, when the imaging distance to the subject is short, for example, within 1 meter, there is a problem that it is difficult to correct the image without a very skilled person.
[0004]
Therefore, in a camera in which the optical axis of the imaging lens and the axis of the viewfinder are physically displaced in the vertical direction, it is necessary to solve a configuration that reduces parallax particularly when the subject and the imaging lens are close to each other. Have issues.
[0005]
[Means for Solving the Problems]
A camera according to the present invention for solving the above problems has the following configuration.
[0006]
(1) A camera includes an imaging lens for photographing a subject, a finder provided at an upper position of the imaging lens, and having a viewing window for looking at the subject, and an imaging lens at a position near a horizontal direction with respect to an optical axis of the imaging lens. Illumination means for illuminating the front direction parallel to the optical axis of the lens.
[0007]
(2) The camera is a camera that can be used underwater, and includes an imaging lens for photographing a subject, a finder provided at an upper position of the imaging lens, and having a viewing window for viewing the subject, and light from the imaging lens. Illuminating means for illuminating a forward direction parallel to the optical axis of the imaging lens at a position near the axis in the horizontal direction.
[0008]
As described above, by providing the illumination unit at a position near the optical axis of the imaging lens and in the horizontal direction, when the subject is viewed from the viewfinder, the brightness of the subject can be divided in the vertical direction. Because it is possible, it is possible to take a picture without parallax by checking the degree of the brightness.
[0009]
In addition, by using this lighting means, it is possible to search for a subject, easily find a subject's creature even during diving at night, etc., and know the color of the original creature by illuminating it. There is a merit that can be.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of a camera according to the present invention will be described with reference to the drawings.
[0011]
As shown in FIGS. 1 and 2, the camera according to the present invention is an underwater camera that can be used underwater, and has a configuration in which an imaging lens 12 is arranged on a body 11 formed in a substantially rectangular parallelepiped shape. Lens unit 13, a shutter switch 14 provided on the right side of the top surface of the body 11, an aperture button 15 provided on the left side of the top surface, and an upper position of the lens unit 13 provided at a center position of the top surface. A viewfinder 16 having a viewing window, an external strobe connector 17 connected to an external strobe on a side surface, and an optical axis 18 of the imaging lens 12 at a position near the optical axis of the imaging lens 12 in the horizontal direction and in front of the same. It comprises a target light 19, which is a lighting means for illuminating the direction, and a target light on / off button 20 provided on the back side of the body 11.
[0012]
The target light 19 is turned on (illuminated) from the light axis 21 at a position horizontally coincident with the optical axis 18 of the imaging lens 12 as needed. By providing such a light, the center of the subject is provided. The illumination intensity of the part is high, and then the illumination decreases as going up and down. This means that the center of the brightest subject relative to the subject viewed through the viewfinder is the position of the subject on the imaging lens, and accordingly, shooting without parallax is possible.
[0013]
In particular, it is effective in short-distance shooting, and in the case of short-distance shooting, the distance between the imaging lens 12 and the finder 16 becomes longer, so that the parallax in the vertical direction increases. At this time, if the target light 19 is turned on, it is possible to know which position is the optical axis 18 of the imaging lens 12 depending on the lighting condition, and it is possible to avoid photographing a shifted subject.
[0014]
Here, the target light 19 is turned on / off by a target light on / off button 20 provided on the back of the body 11, but is not limited thereto. It may be turned on at the time.
Actually, although not shown, the target light 19 is turned on when the shutter switch 14 is half-pressed, and when the shutter switch 14 is turned on, the target light 19 is turned off and at the same time, the external strobe connector 17 is turned on. And a control circuit for turning on a strobe connected to the camera and photographing.
Further, the turning on of the target light 19 is not limited to turning on when the shutter switch 14 is half-pressed. Some objects are extremely frightened by the light. Can be turned on / off manually to turn on / off the light.
[0015]
Now, the point in which the parallax can be reduced when taking a close-up image by looking through the viewfinder 16 will be described in more detail with reference to FIGS.
First, the relationship between the finder subject range 31 that can be seen from the target light 19 and the finder 16, the imaging lens subject range 32 that can be photographed by the imaging lens 12, and the subject 33 are shown in a position parallel to the optical axis 18. It is assumed that the light axis 21 of the target light 19 exists and the subject 33 exists at a substantially central position in the imaging lens subject range 32. Then, as for the subject 33 visible in the finder subject range 31, about the upper half of the subject 33 can be captured in the lower position. This difference is caused by a difference in the vertical position between the imaging lens 12 and the finder 16.
When the target light 19 is turned on in this state, illumination is performed from the left side of the subject 33 as viewed from the camera. Now, assuming that the illumination range 34 extends to about half of the subject 33, as shown in FIG. 3, the effect of the illumination on the subject 33 in the imaging lens subject range 32 is such that the ray S1 of a line parallel to the optical axis is one. The next light beams S2, S3,... S4, S5 become darker in this order.
When this is viewed in a finder subject range 31 viewed through the finder 16, as shown in FIG. 4, the brightest ray S11 is the optical axis 18 with respect to the subject 33 seen at the lower position. , S14, and S15 in the directions away from each other. Therefore, if the position of the brightest light beam S11 of the subject 33 seen by the viewfinder 16 is adjusted to the lower position of the subject range 31, the subject 33 existing in the imaging lens subject range 32 can be substantially at the center position. .
This is particularly effective in the case of close-up shooting in which the difference in the physical vertical relationship between the imaging lens 12 and the viewfinder 16 is noticeable.
[0016]
In addition, the target light 19 has various usability in addition to being able to reduce parallax particularly at the time of close-up shooting. For example, it is possible to search for a creature that lives in the shade of a rock or to easily find a creature of a subject even when diving at night. Alternatively, it can greatly contribute to assisting, for example, being able to know the color of an original creature by illuminating it. To realize these, the target light 19 and the shutter switch 14 may be linked to each other as described above.
[0017]
【The invention's effect】
As described above, the camera according to the present invention has a structure in which the irradiating means is provided in a position in the horizontal direction to the optical axis of the imaging lens and in the vicinity thereof. The difference between the subject and the subject looking through the viewfinder, i.e., by illuminating the area where the parallax becomes large, by illuminating the illuminating means, the horizontal position of the optical axis of the subject captured by the imaging lens is the brightest, and the darker as it goes up and down. The same can be seen from the viewfinder, so it is easy to set the range of the subject to be captured by the imaging lens based on the lighting conditions, and consequently reduce parallax with the subject to be captured by the imaging lens. There is an effect that can be.
[Brief description of the drawings]
FIG. 1 is a perspective view of a camera according to the present invention.
FIG. 2 is a perspective view of the camera as viewed from behind.
FIG. 3 is an explanatory diagram showing a relationship between an illumination range and a subject range as viewed from a positional relationship among a target light, an imaging lens, and a finder.
FIG. 4 is an explanatory diagram showing a relationship between an illumination range and a subject range as viewed from the positional relationship among the target light, the imaging lens, and the viewfinder.
FIG. 5 is an explanatory diagram showing a state of a subject taken in from an imaging lens when looking through a finder according to a conventional technique.
[Explanation of symbols]
11; body; 12; imaging lens; 13; lens unit; 14; shutter switch; 15; aperture button; 16; finder; 17; external strobe connector; 18; optical axis; Target light on / off button, 21; light axis, 31; finder subject range, 32; imaging lens subject range, 33; subject, 34; illumination range.

Claims (2)

An imaging lens for photographing the subject,
A finder provided at an upper position of the imaging lens and having a viewing window for viewing a subject;
Illumination means for illuminating a forward direction parallel to the optical axis of the imaging lens at a position near the optical axis of the imaging lens in a horizontal direction,
A camera comprising: A camera that can be used underwater,
An imaging lens for photographing the subject,
A finder provided at an upper position of the imaging lens and having a viewing window for viewing a subject;
Illumination means for illuminating a forward direction parallel to the optical axis of the imaging lens at a position near the optical axis of the imaging lens in a horizontal direction,
A camera comprising:

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