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A.M. Lever
Automatic diaphragm operation
when ”A” appears
in the window.
Diaphragm stopped down to
preselected aperture when “M”
appears in window.
30 Focusing ring
Distance scale
Depth-of-field scale
Alignment dot
Align with matching alignment
dot on camera body for rapid
lens mounting.
Aperture ring
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Exposure meter coupler
Couples the aperture ring to
any prism finder with built-in
meter
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