Programmed Exposure Measurement Graph - Nikon FG Instruction Manual

Programmed exposure measurement graph
The graph represents the optimum combinations of
f/stop and shutter speed, for the brightness of any
scene, which were determined through intensive
statistical and empirical studies and fed into the FG's
computer brain for its pre-arranged exposure pro-
gram. Thus, when actual exposure measurement
takes place at the time of shooting, the ideal combi-
nation for actual conditions is selected and perfect
exposure results for every shot.
(Graph-green line represents the curve for the f/1.4
lens. For lenses with other apertures, the graph is
read from that particular aperture opening until inter-
section with the diagonal line and then in the same
downward line, e.g., the black line for the f/4 lens.)
Notes:
1) On
P.
the following lenses will cause slower shutter speeds
than those indicated in the viewfinder while correct expo-
sure is assured. Therefore, in cases where more exact
shutter speed information is desired, A or manual mode is
recommended:
50mm fll.2 Nikkor(No. 250525 or smaller)
58mm til. 2 Noct-Nikkor(No 175000 or smaller)
EO 50rv300mm tl4.5 Zoom Nikkor(No. 179500 or smaller)
Every AI-converted 85mm tll.8 Nikkor
Every AI-converted 105mm fl4 Micro Nikkor
Every AI-converted 85rv250mm fl4 Zoom Nikkor
2) On p, the following lenses and accessories cannot be used
as they do not have an aperture coupling device. Use
these lenses on A or manual modes.
All Reflex Nikkors
All PC Nikkors
(when perspective is shifted, use manual mode)
Bellows attachment
Extension Ring Set K
3) On
P.
when using teleconverters or AI-converted lenses of
maximum apertures of f14.5 or smaller, shutter speeds
available are limited to very slow ones Therefore, A or
manual mode is recommended.
4) On
P.
when using AI-converted lenses of maximum aper-
ture larger than tl2.8, the metering range for the higher EV
values will be reduced down to
a
maximum of two EVs de-
pending on the aperture.
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