Vixen Polarie User Manual page 9

BEFORE USE
Requirements and Useful Items
(1)It is strongly recommended that your camera have functions
that satisfy the following specifications.
A bulb shutter mechanism is needed for long exposures. If it is
not available on your camera, both an ISO speed setting faster
than 3200 and a shutter exposure time setting longer than 30
seconds are required.
Shutter release cables.
Wide-angled photographic lenses are recommended.
Manual Focus is available. Auto Focus rerely works in night-
sky scenes.
DSLR cameras with an optical viewfinder or "Live Focus" are
preferable.
(2)It is best to use a remote release cable with functions to preset
the shutter exposure times.
are not recommended.
Infrared wireless release models
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