Term - Rack and pinion focusing
|Rack and pinion focusing||SWPP and BPPA Photographic Glossary|
Wednesday 28th January 2015
Rack and pinion focusing
A mechanical focusing system used on copying or monorail cameras. A pinion engages a rack on a slide. Focusing is achieved by turning a knob or wheel, which moves the lens or image panel.
Information provided by: SWPP BPPA
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