Photography – With viewfinder – Selective or adjustable viewfinder field
Patent
1998-01-22
1999-10-19
Perkey, W. B.
Photography
With viewfinder
Selective or adjustable viewfinder field
396436, 74553, G03B 1312, G05G 110
Patent
active
059702672
ABSTRACT:
A field frame switching apparatus for a finder in which an elongated standard visual field, a narrow-width visual field and a laterally-elongated visual field can be selected. A pair of narrow-width visual-field-forming light-interception frames are provided with vertical light-interception walls which are adapted to block out the right and left ends of the standard visual field. A pair of laterally-elongated visual-field-forming light-interception frames are provided with lateral-light-interception walls are adapted to block out the upper and lower ends of the standard visual field. An operation member is adapted to move the narrow-width visual-field-forming light-interception frames in a first direction toward a narrow-width field-frame-forming position in which the vertical light-interception walls are located within the standard visual field frame and in a second direction toward a laterally-elongated field-frame-forming position. An association movement mechanism moves the lateral-light-interception walls of the laterally-elongated field forming light-interception frames into or from the standard visual field frame. The invention also discloses an operation apparatus for the field frame switching apparatus, and an operation apparatus for a rotary operation member.
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Inazuka Masahiro
Ito Hiroshi
Asahi Kogaku Kogyo Kabushiki Kaisha
Perkey W. B.
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