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Well, you might accept a small amount of rotation blur in exchange for lower noise overall - the rotation blur will be partially hidden by the alignment pass in registax, and actually you can hide it completely with enough work (multiple passes, align on different regions each time, slice n dice to make a composite result).
It's just a question of how much effort you want to put in :-)
Also, for mars almost all of the detail is in the red channel, so there's not as much visible blurring as you might expect.
I tried something last night while waiting for the clouds to part (they didn't). I had mars videos from Ballarat for 2:01, 2:05 and 2:10, about 2400 frames of each colour in each of these runs. I loaded all the red frames into registax - i.e. about 8000 frames - and processed them all together.
The result is that I got to stack 2500 frames instead of the normal 800 or so, here is the result (red channel only). Not too much motion blur evident even though the capture spanned almost 13 minutes!
You can also write software to "undo" motion blur - this is something I might try one day. I'd love to record 30 minutes on Mars and be able to process almost all of it :-)
regards, Bird
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