Manual exposure mode, How to select f/stop and shutter speeds, A—automatic exposure mode – Nikon FG User Manual
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Manual exposure mode
Manual operation allows you to shoot at your choice
of any combination of the f/stops and eleven shutter
speeds on the camera’s dials. (Note that you cannot
set shutter speed between numbered settings.) By
varying these combinations, you can achieve not only
correct exposure but also such special effects as
under- or overexposure, blurred action, etc. Manual
is also valuable to develop your photographic instincts
and skills, and is additionally recommended when an
electronic flash other than the Nikon dedicated flash
unit is used.
How to select f/stop and shutter speeds
Exposure is determined by the combination of th
shutter speed and f/stop (aperture opening). As th
numbers on either the f/stop or shutter speed dia
increase by one value, the amount of light enterir
the film is reduced by approximately one half. Fc
example, the amount of light at f/125 sec. is aboi
one-half that at 1/60 sec., and the amount of light:
t/16 Is one-half that at f/11. Brighter scenes requit
either faster shutter speeds or smaller apertut
openings (larger f/numbers) or a combination of bot
which will give the same amount of exposure: dark«
scenes require the reverse. For example, 1/250 sei
at f/8 is the same as either 1/500 sec. at f/5.6 <
1/125 sec. at f/11.
Shutter speed/aperture combination to give
the same exposure.
Shutter speed
(sec.)
1/1000
1/500
1/250
1/125
1/6C
Aperture
(f/number)
4
5.6
8
11
16
Fast shutter speed
(freeze action)
Slow shutter speed
(intentional blur)