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The LEICAFLEX lenses
All LEICAFLEX-R lenses are of the same external design, i.e. the rotatable diaphragm pre-setting ring (11), the fixed ring with depth-of-field indication (12), and the distance setting ring (13) are arranged identically. The left hand thus becomes very easily accustomed to rapid and reliable operation with all focal lengths.
Automatic diaphragm
All LEICAFLEX-R lenses are fitted with an automatic diaphragm. This means that the viewfinder image is viewed always — i.e. before and after exposure — at full aperture and thus maximum viewfinder bright- ness. Immediately before the exposure or when the depth-of-field button (6) is depressed the lens diaphragm is closed to the pre-set value.
