I III:! Il:!lI:>aper rure rtllg IS eriqraveo WHn r--
nu mbers from maximum aperture through 16.
The lens opening is set
by
rotating this until the
desired number is aligned with the index
(e
or
.1.
When other conditions remain constant, light
passing through a lens generally decreases 50
percent for every full-stop increase in F-number
lfor example. when the aperture number of a
fast lens is increased from F5.6 to FB, the light
passing to the film decreases by 50 percent).
I-\S
me apertu re ngu re decreases, the light
passed increases. The thaore tiea: relation be.
tween aperture and light volume is shown in the
diagram. In practice, this varies somewhat at
large or maximum apertures, but your SR-T
101 and
Me
Rokkor-X lenses have built-in com-
pensation for this to give you most satisfactory
exposure.
NOTE:
· "Click" stops are provided for half-stop aper-
ture settings. Intermediate shutter speeds can-
not be set.
· The figure "8" on the shutter speed dial is
used when an exposu re duration of over 1
second is required. The shutter will remain
open wh iIe the shu tter release is depressed.
· The red figure "60" on the shutter speed dial
indicates the maximum shutter speed to be
used in conjunction with electronic flash.
· The shutter speed at which the camera is set
is shown on the shutter speed scale visible in
the viewfinder.
· Since light striking the film is affected by a
combination of aperture and shutter speed,
exposure can be adjusted by changing either
or both of these settings.
F·No.
Theoretica
Light
Volume
To Next Page
Loading...
