| 摘要 |
A single-lens reflex camera of the type which provides automatic exposure determination with light received through the objective. A mirror or reflector has a viewing position in the path of light received through the objective and permitting proper automatic exposure determination. This reflector also has an exposure position situated beyond the latter path of light and preventing proper automatic exposure determination. For special photography purposes, a manually operable positioning structure coacts with the reflector to maintain it in its exposure position. A manually operable selecting structure is provided for selecting either automatic exposure determination or one of a plurality of exposure-determining factors. A shutter release is available to be manually actuated for tripping the shutter. A blocking structure coacts with the shutter release as well as with the positioning structure and selecting structure to block the shutter release automatically in response to location of the positioning structure in its position maintaining the reflector in its exposure position and to location of the selecting structure in the position providing for automatic exposure determination.
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