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Old 13-07-2015, 11:59 AM
SpaceNoob (Chris)
Atlas Observatory

SpaceNoob is offline
 
Join Date: May 2012
Location: Canberra
Posts: 268
Quote:
Originally Posted by RickS View Post
Chris: if you're getting 50 ADU from the flush then that's adding about 8.37e- of shot noise [sqrt(signal*gain)]. That's comparable to the read noise and not insignificant. Unlikely to be an issue for LRGB imaging but it probably will result in a SNR hit with narrowband imaging.



Good to hear you're back on the straight and narrow, Lewis
Ok, it didn't seem that large a difference... I did a few tests before capturing a dark library, 50adu wasn't the exact value but on the bias' there was around 2-5% increase in base level ADU.

Like I said, we'll see what happens with SII and OIII subs, but if its around a 2-5% difference and I don't end up with ghosting, I'll be keeping it turned on
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