Olympus OM-1 Instrucciones de operaciones descargar pdf (Pagina 12)

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.

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.

SETTING THE SHUTTER SPEED RING

SETTING THE APERTURE RING

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