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I also agree with the "don't be afraid of gain" comment from Ian, allegedly said by Damian. I've tried low gain to see if the lower noise is better but in practise the lower gain just makes it harder for the software processing to "lock" onto features.
Nowadays I'm not afraid of high gain and grainy individual frames - if you stack enough of them together then the problem sorts itself out :-)
Here's one of the raw frames from that Ballarat Monday night - look how noisy it is, mostly cause I had the camera working close to it's limit. Short exposures give sharper details.
p.s. don't forget that rotation blur depends on your image scale - if you're working with a smaller image then the rotation blurring is much less.
regards, Bird
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