ATIK Cameras 11000 Quick Start - Manual (Page 13)

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Atik 383L+ specific information
The 383L+ is fitted with a mechanical shutter but, as is inevitable
with shuttered cameras, this imposes some constraints on the
minimum advisable exposure length owing to the time it takes for
the shutter to open and close. A minimum
exposure time of at least 200ms is recom-
mended in order to minimize the effects of
vignetting.
The “Dark” check box causes the shutter to re-
main closed during exposures, allowing dark
frames to be taken. Please note that whilst
the shutter can be relied upon to keep light
out of the camera during night-time observ-
ing conditions, additional measures must be
taken to ensure that the camera is light-tight
when taking dark frames during the day.
Again, thank you for your trust in our products. We hope you enjoy
astro-imaging for years to come.