JPH04133241U - amphibious camera - Google Patents

Abstract

(57) [Summary] [Purpose] To enable a camera dedicated to underwater photography to take pictures on land without damaging its underwater photography function. [Structure] In an underwater photographic camera incorporating a special lens having the ability to form a real image of a subject on a film surface only underwater, a water filling chamber covered with a transparent plate is provided in front of the special lens.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a camera that can be used for both underwater photography and land photography. be.

0002

[Conventional technology]

Conventional underwater photography cameras only form a real image of the subject underwater on the film surface. There are cameras that incorporate special lenses that have the ability to This camera can be used with either the entire lens above the water surface or the upper half of the lens. When taking a picture with the bottom half of the body above the water surface and the bottom half below the water surface, Images of objects seen higher up cannot be captured.

0003

[Problem that the idea aims to solve]

This invention is a camera for underwater photography that incorporates the special lens mentioned above. By adding a function that allows shadows, the camera can be used for both underwater and land photography. The purpose of the project is to provide a mela.

0004

[Means to solve the problem]

In order to achieve the above purpose, the present invention captures the real image of the subject only underwater. An underwater photography camera that incorporates a special lens that has the ability to form an image on a surface. A water filling chamber covered with a transparent plate is provided in front of the special lens. It is something that

[0005]

【Example】

Embodiments of the present invention will be described below based on the drawings. 1 is a camera for underwater photography. The lens is equipped with a special lens 2 that has the ability to form an image on the film surface only underwater. A lens barrel 3 is coupled to a camera body 4. 5 is pushed forward from the tip of the lens barrel 3. With the hood attached so as to protrude, an O-ring 7 is inserted around the outer periphery of the tip 6 of the lens barrel 3. The cylindrical portion 8 is fitted in a fluid-tight manner, and the diameter of the cylindrical portion 8 is expanded diagonally forward from the tip of the cylindrical portion 8. The portion 9 and the end ring 11 that annularly protrudes forward from the distal end surface 10 of the enlarged diameter portion 9 are aligned. The inner surface of the enlarged diameter portion 9 is provided with a stripe 12 for preventing diffused reflection. 13 is A transparent plate fitted into the end ring 11, made of acrylic, optical glass, etc. The peripheral portion of the holder is liquid-tightly joined to the end face 9 via an O-ring 14. 15 is the end ring A tightening ring screwed onto the outer periphery of transparent plate 13 tightens the peripheral portion of transparent plate 13 between it and end face 9. It has a tightening edge 16 that can be tightened. 17 is a water filling chamber, which is filled with water by a hood 5 and a transparent plate 13. A sealed chamber 18 formed in front of the lens 2 is filled with water 19. 20 is a camera A handle is attached between the main body 4 and the cylindrical part 8, and 21 is an accessor provided at the rear end of the handle 20. A leash, 22 is an accessory shoe provided on the top of the camera body 4, and 23 is a grip. This is a finder mounting base provided on the upper surface near the rear end of the hand 20.

[0006] The present invention is not limited to the above embodiment, and the hood 5 is integrated with the lens barrel 3. It can also be shaped into the body of the water, and it can also be used to photograph subjects above and below the water surface at the same time. When doing so, the refractive index and color of light are different in the air and underwater, so it is necessary to A transparent plate subjected to a similar optical treatment may be used in place of the transparent plate 13. Ma In order to create special photographic effects, the prism can be replaced with the transparent plate 13. can be. Other design changes may be made as appropriate.

[0007]

[Effect of the idea]

As mentioned above, this invention uses a transparent plate to cover the front of a special lens for underwater photography. Since the filling chamber is provided, it is possible to take pictures with all or part of the lens above the water surface. Even if the lens is completely immersed in water, the subject will appear on the film surface, just as when shooting with the entire lens underwater. It is possible to form a real image of the body, and it can be used on land without compromising the functionality of underwater photography. It is possible to provide a camera that can also take pictures above.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an amphibious camera according to the present invention.

[Explanation of symbols]

1...Underwater photography camera, 2...Special lens, 13...Transparent plate, 17...Water filling chamber.

Claims (1)

[Scope of utility model registration request] Claim 1: An underwater photography camera incorporating a special lens capable of forming a real image of a subject on a film surface only underwater, wherein a water filling chamber covered with a transparent plate is provided in front of the special lens. An amphibious camera characterized by: