"On a CCD Labs Q8-HR I have, even at gains of 0 and 1 (on its 0-63 scale), the camera would hit 65535 on bright objects (like the ceiling above my desk). There's no point in running this camera at gains higher than 0 or 1.
Why is there no point? The camera only holds 25k e-. If a gain of 0 or 1 gets me to 0.38 e-/ADU (so that those 25k e- become 65535), running at 0.1 e-/ADU will only serve to limit my dynamic range. Each single electron already comes out to more than 2 ADU."
http://www.stark-labs.com/blog/files/GainAndOffset.php
"Since this time, QHY has gone on to
create a wide range of cameras and CCD
Labs acts as a VAR (Value Added Reseller)
for the cameras (a number of other dealers
act as resellers or VARs as well, including
Starizona in the USA). One camera, the
QHY8, is sold through CCD Labs as the
Q453-HR (formerly the Q8-HR) and a
second, the QHY2-Pro (not to be confused
with the entirely different QHY2), is sold
through CCD Labs as the Q285-M. CCD
Labs provides the cameras with additional
capture and processing software, an install
disk with a manual, assembles the cameras,
does a full quality control check before
shipping to customers, and seals the CCD
chamber following an argon purge to keep
it nice and dry."
http://www.stark-labs.com/craig/arti...CDLabs_ATT.pdf