1988-02-02
1989-09-26
Gellner, Michael L.
G03B 302
Patent
active
048704369
ABSTRACT:
A close-up photographing device wherein, once a focused or a near focused condition is reached, it can be maintained irrespective of changing of the photographing magnification, and a photographing procedure can be simplified. The device includes first and second mounting members having a photographing optical system and a film mounted thereon, respectively, a third mounting member on which the first and second mounting members are mounted for movement in a direction of the optical axis of the optical system, and a manually operable magnification changing member having first and second means for controlling movement of the first and second mounting members, respectively, relative to the third mounting member. By manual operation of the magnification changing member, the first and second mounting members are moved simultaneously relative to the third mounting member to change the magnification while maintaining a focused condition or a near focused condition.
REFERENCES:
patent: 3408145 (1968-10-01), Walzberg
Gellner Michael L.
Minolta Camera Kabushiki Kaisha
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