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Group: There has been a lot of discussion regarding the gain and offset settings for this fine camera. First, I am not an expert nor an imaging guru. I just like to produce "pretty pictures". I have had my 2600MC Pro in operation since last fall. When I first started using it, I always used the selection in the ZWO setup menu of "lowest read noise", which produces a gain of 100. The images produced with this setting were pretty, but a few months ago I read an article on one of the imaging forums about the advantages of using Zero Gain. On my next imaging session, when I opened up the setup menu, I selected Zero as the gain setting, and saw that this is also the gain that results from using the menu selection "Highest Dynamic Range". I have used this setting since then. One thing I noticed is that at this setting the stars do not seem to be over-saturated, and the star colors are much richer. By the way, I should mention that my imaging site is Bortle 3, and I always use sub-exposures ranging from 120 seconds to 240 seconds. Just thought I'd pass my thoughts along, as added fodder to this discussion. Cheers, Stargazer66207 |
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Well.. It depends on several things such as site bortle , seeing , temperature, do you have more time or you have only 2-3 hours, target type.. I tried both gains Zero and 100,, you will get something and lose something.. ! In Zero gain you will get dynamic range but slower and with noise, In gain 100 you will get less noise and faster but you will lose HDR.. As I am limited in time and site is bortle 2 I always use gain 100.. but lose a little bit of HDR. So.. before you start your imaging session, do 2 images as a test.. one with Zero and the other with 100 and see which is better for you. Good luck! |
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| I am in Bortle 5 and always use Gain 100. Plus I do a lot of narrowband imaging. |
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Dale, If you're doing long exposures for narrowband, then Gain 100 is probably a good idea. The only filter in my image train is an IDAS UV/IR blocker. Stargazer66207 |
