Setting The Shutter Speed Ring; Setting The Aperture Ring - Olympus 1 Instructions Manual

SETTING THE SHUTTER SPEED RING

The length of time that light is allowed
to strike the film is controlled by the
focal plane shutter. The shutter con-
sists of two opaque "curtains" which
travel across the opening and allow
light to reach the film. The speed and
coordinated movement of these cur-
tains determine in fractions of a second
the exposure time for your picture.
For example, 1000 on the shutter
speed ring indicates 1/1000 of a second
and 60 indicates 1/60 of a second. The
figure 1 indicates one full second. The
B (Bulb) setting is used for longer time
exposures. At this setting the shutter
will remain open as long as the shutter
release button is held down. For ex-
posures less than 1/30 of a second, it is
advisable to use a cable release, tripod
or other steadying devices to avoid
camera movement which can result in
blurred or fuzzy pictures.
To set the shutter speed turn the
shutter speed ring in either direction
until the desired number clicks into
place opposite the reference dot on the
lens barrel. Set the ring only at click-
stop positions as no in-between settings
can be used. Shutter speeds may be set
before or after advancing the film.
NOTE: Speeds from "B" to "60" are
indicated on the ring in blue as an easy
reference to "X" flash synchroniza-
tion.
11

SETTING THE APERTURE RING

The amount of light allowed to strike
the film is represented by "F" numbers
or "F" stops engraved on the aperture
ring. The higher the F number, the
smaller the lens opening (less light); the
lower the number, the larger the lens
opening (more light). When setting the
aperture ring you can use either the
click-stop positions or any in-between
settings to obtain precise exposure.
All lenses in the OLYMPUS OM SYS-
TEM (other than specialized lenses)
provide fully automatic diaphragm
control allowing you to focus and
compose your picture with the lens at
maximum aperture or "wide open."
The diaphragm will automatically stop
down to the preselected F stop at the
moment of exposure and immediately
re-open when exposure is completed.