Lens barrel

Details Lens barrel Lens barrel

1996-12-27

1998-01-13

Perkey, W. B.

Photography

Having lens converter or extension tube

G03B 1336

Patent

active

057088683

ABSTRACT:
The present invention relates to a lens barrel with an extender attachable thereto, and comprises a focusing lens movable in directions of an optical axis, a position detecting member for detecting a position of the lens, a data detecting member for detecting information on the extender, and a forbidding member for setting a permissible area in which the autofocusing is permitted with respect to the position of the lens based on the information, permitting the autofocusing when the position of the lens is within the permissible area, and forbidding the autofocusing when the position of the lens is out of the permissible area.

REFERENCES:
patent: 4531158 (1985-07-01), Murakami et al.
patent: 4963910 (1990-10-01), Ishimura
patent: 5231444 (1993-07-01), Watanabe et al.
patent: 5371566 (1994-12-01), Asakura
patent: 5548369 (1996-08-01), Iijima

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