Pentax 67II - Manual (Page 46)

ADVANCED OPERATION
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Eyepiece Shutter When using the camera in a
situation where your eye will not
remain at the viewfinder when
taking the picture, such as when
using the Self-Timer Mode, set
the eyepiece shutter to the down
position.
Depress the shutter release
button.
Eyepiece Shutter
When using the camera in a situation
where your eye will not remain at the
viewfinder when taking the picture, such
as when using the Self-Timer Mode, stray
light may enter the viewfinder causing an
incorrect exposure. Using the eyepiece
shutter will block any stray light, assuring
a proper exposure.
● In normal photography, set
the eyepiece shutter to the
up position.
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