Leica M3 - The Collapsible Lenses; Lens Coating; Lens Care

The Collapsible Lenses
When not in use, certain LEICA lenses
(
for instance the 50 mm ELMAR f/ 2.8
and the collapsible 90 mm ELMAR f/4)
can be
retracted by slightly turning
the front to the left and pushing
into the camera body . For use, fully
extend the lens, and lock by turning
to the right . (The collapsible 90 mm
ELMAR f/4 can only be focused when
it is properly ex tended and locked. )
With any lens, alw ays remember to
ta
ke off the lens-cap.
Lens Coaling
Modern coated LEICA lenses show a colo red sheen on the surface , due to an anti - reflection
la yer which appreciably increases the brilliance and crispness of the image . The outer
surfaces are hard coated and will therefore stand up to careful cleaning .
Lens Care
An y high - quality lens can yield its best performance only if the outside glass surfaces
are kept clean. And it is much better to keep them clean than to keep cleaning them.
A
colorl ess ultra- v iolet f ilter (LEITZ UVa) left permanently on the lens, wi ll protect the
surface against outside influences (e.g., fine sand at the seaside). The lenshood , too ,
guards the lens against · accidental contact with your fingers , and against splashes in
rainy weather . To remove dust use a soft camel's hair brush, or a clean linen cloth
pre v iously washed with pure soap . ( Other washing or cleaning agents may lea ve harmful
chemical residues .)
In addition to its name , ev ery LEICA lens also carries its own "personal " serial number
e ngraved on the front mount . Make a note of this number, and of the serial number of
y our LEICA; they may be pro ve to be of great help in case of loss.
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