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Hi Paul,
Wow … that thread was a few years ago now, but I'm glad that you found some of the information interesting or useful.
I've since moved on to ZWO cameras, but your question is still relevant.
Yes, it's definitely feasible. I sometimes use zero gain to good effect on "high dynamic range" targets with bright and dim areas (M42, Omega Cent, 47 Tuc, etc).
Although my most common method is to take sets of subs at various durations (eg. 30 sec or less for stars, 300 sec for a galaxy or nebulosity), then blend together … to retain colour in the bright stars.
Hope this helps.
I'm others on IIS will have plenty of tips also.
Cheers,
Jeff
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