Nikon Nikkormar FT3 - Exposure con Trois

EXPOSURE CONTROLS
The amount of exposure the fUm receives is determin-
ed by a combination of shutter speed and aperture.
The larger the lens aperture, the more exposure. Like-
wise,
the slower the shutter speed the greater the
exposure. Aperture is expressed in f/numbers with
larger numbers representing smaller apertures and vice
versa.
For example, f/8 gives twice as much exposure
as f/11. Shutter speed is expressed in seconds or
fractions of a second. The numbers on the Nikkormat
shutter-speed scale are reciprocals of the actual speeds
(250
represents 1/250 second , etc.).
Camera
aperture and shutter-speed controls are cal-
culated so that an increase of one f/number com-
pensates for a one-step decrease in
shutter speed. For
example, 1/250 at f/8 is equivalent to 1/125 at fIll.
The table below shows how aperture and shutter -
speed are
interrelated. All the combinations give the
same exposure.
Aperture
f/1.4
f/2
f/2 .8 f/4
f/5 .6
Shutter speed
1/500 1/250
1/125 1/60
1/30
(seconds)
10