Nikon FG-20 - Meter Coupling Lever

Meter Coupling Lever @
is lever couples with the lens' meter coupling ridge
® on the aperture ring to perform full-aperture meter-
ing . Lenses whose aperture ring doesn't couple with
this lever can not be used. For the following lenses,
stop-down exposu
re measurement must be per-
formed.
F or lenses or accessories without automatic
diaphragms
When a PC-Nikkor lens or bellows attachment is
used , focusing should be done with the lens wide
open while exposure measurement and shooting
must be done with the lens st op p ed down .
• With a PC-Nikkor, the correct exposure must be determined
on manual before shifting the lens.
For fixed-aperture lenses , photomicro-
graphy , or astrophotography
Since the aperture is fixed when using Reflex-Nikkor
lenses, or
in photomicrography or telescopic photog-
raphy, it is impossible to change the exposure by
varying the aperture. So, on auto, take the shot by
simply depressing the shutter release button. On
manual, turn the shutter speed/mode selector dial
until the correct exposure
is obtained. If the scene is
too bright to obtain correct exposure, use an NO filter.
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