Shutter Speed - Yashica 635 User Manual

LENS OPENING
The lens opening or aperture forms one factor for
controlling the intensity of light transmitted
through the lens and reaching the film plane.
Your Yashica camera features an ultra-sharp
Yashinon lens with aperture settings of f/3.5, 4
5.6, 8, 11, 16 and 22. The maximum aperture is
f/3.5, while the minimum is f/22.
To adjust the lens opening, rotate the Aperture
Control Wheel with your thumb and set the
desired setting in the Shutter Speed/Lens
Aperture Indicator Window. The lens opening
can be set at any in-between settings, as required.

SHUTTER SPEED

The shutter speed controls the length of exposure of the photosensitive emulsion of the film to light.
Your Yashica camera is equipped with a precision engineered Copal Shutter with speed settings of
1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1 /125, 1/250 and 1/500 sec.. and B.
The B setting is for exposures longer than one second. At this setting, the shutter remains open as
long as the Shutter Release Button is kept depressed.
At 1/15 sec. or slower speeds. mount your camera on a tripod and use a cable release to trip the
shutter in to prevent camera shake.