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Old 23-06-2013, 08:41 PM
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naskies (Dave)
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Join Date: Jul 2011
Location: Brisbane
Posts: 1,865
I'm using a GSO RC8 (1625 mm focal length; 50% secondary obstruction) paired up with a 8300 chip. I find that native resolution at 0.685''/pixel takes a loooong time to get good smooth data - ideal exposure calculators give me 80 mins for narrowband and 30 mins for L subs!

At the moment, 2x2 binning (1.4''/px) for narrowband and L seems to work well - 20 min H-alpha subs turn out quite well. My local seeing at home for narrowband subs seems to be around 4-5'', occasionally 3' - so I'm not sacrificing any resolution by binning.

I probably wouldn't go for 2286 mm and 5.4 um pixels (0.48''/px)...
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