CLOSE-UP LENS AND CLOSE-UP PHOTOGRAPHING AUXILIARY DEVICE

PROBLEM TO BE SOLVED: To provide a close-up lens used with a camera such as a digital camera and capable of performing such macro-photographing as the photographing of an image stored in a developed film. SOLUTION: This close-up lens is arranged in front of the photographing lens of the camera and c...

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Bibliographic Details
Main Authors SATO MASAE, MORI NOBUYOSHI
Format Patent
LanguageEnglish
Published 26.05.2000
Edition7
Subjects
ACCESSORIES THEREFOR
APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM
CINEMATOGRAPHY
ELECTROGRAPHY
HOLOGRAPHY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHOTOGRAPHY
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To provide a close-up lens used with a camera such as a digital camera and capable of performing such macro-photographing as the photographing of an image stored in a developed film. SOLUTION: This close-up lens is arranged in front of the photographing lens of the camera and constituted of a negative first lens group and a positive second lens group in order from an object side. In this case, when lens total length of the close-up lens is defined as L, and the focal distance is defined as (f), the expression of 0.4<L/f<1.0 is satisfied. And when the photographing magnification in the case of close-up photographing is defined as (m), and the magnification of the close-up lens is defined as(mc), the expression of |m/mc|<0.04 is satisfied.
Bibliography:Application Number: JP19980314672