Automatic Diaphragm; Lens Hoods - Leica R6 Instructions Manual

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Automatic diaphragm
Most LEICA R lenses have automatic dia-
phragms, i. e. you always see the viewfinder
image atfull aperture and hence atmaximum
viewfinder brightness both before and after
exposure. Just before the exposure or when
you press the depth-of-field lever, the lens
diaphragm closes to the preset value.
Certain LEICA R lenses do not have an
automatic diaphragm. These are the 28 mm
f /2.8 PC-SUPER-ANGULON-R, the 35 mm
f /4 PA-CURTAGON-R. the 400mm f /6.8
TELYTTM-R, the 5OO mm f/8 MR.TELYT-R,
the 560mm f/6.8 MR-TELYT-R. and the
800 mm f / 6.3 MR-TELYT-S. For these, see
'Working-aperture exposure control', page 20.
Lens hoods
A functionally designed lens hood is an
essential part of every LEICA R lens. Use
the lens hood whenever you use the camera,
because it protects the lens against stray
light and glare, rain drops and fingerprints.
Most LEICA R lenses are supplied with a
fixed telescopic lens hood.
The lens hood also serves as a standard filter
holder.
The screw-in lens hood for the 28 mm f / 2.8
PC-SUPER-ANGULON-R also'serves as a
holder for size 67 EW extra-wide-angle
filters.
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