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Hey TonyBarry,
Yeah just trying to get the Cassini Division and at least a little detail on Saturn would be nice. The fact I have a dobsonian goto mount and not an EQ tracking mount (Or is it EZ?...) will that effect the duration of my session?
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Hi Matt,
Goto Dobs are good for tracking, but not so good for long exposures. Since you are on Saturn, long exposures are irrelevant. You will have quite short exposures (e.g. 1/500th second to 1/100th second). What will matter is the seeing - how good the air is above you.
The knowledgeable people say that Lucky Imaging (which is what you are doing) has an upper limit of (about) 1/100th sec per exposure. That is where the sky is effectively "frozen" and if something is clear it will stay clear for the duration of the image. Now the whole planetary disk will not be clear, but parts of it will be, and that is what AutoStakkert will use.
The Canon will take perhaps 4 frames per second until the CF or SD card is full, and at that point you probably call that one session. Change cards, start another session while you copy the first card to disk. Repeat until weary. You could download to disk straight away (using EOS utilities), but that takes maybe five to ten seconds per image. You are better off just doing a burst to CF. Much quicker to get some numbers under your belt.
Then come inside and stack sessions.
Hope this helps,
Regards,
Tony Barry