|1960 advertisement for the Ricoh 500,|
showing trigger-advance lever extended
scan courtesy Casual Camera Collector (Image rights)
Trigger advance is the name applied to a film advance intended to be pulled by the photographer's forefinger, rather than the more common thumb-operated rapid wind lever. Typically this is a lever which can be extended from the baseplate of a camera, although other possibilities include a lever mounted on the front of the camera, as used in the Konica III. By allowing a photographer to keep his or her eye to the viewfinder while winding, a trigger advance allows sequence shooting nearly as rapid as with a power winder.
|Ricoh 35 with baseplate trigger advance|
image by 33dollars (Image rights)