Quote:
Originally Posted by bojan
For example, the maximum exposure I can obtain without guiding is 30 sec with my 1000mm lens.
From this I have 75% of frames usable, the rest are not as a result of jitter (caused by transfer gears, 47 teeth, from gear box to worm).
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OK, well maybe 2 minutes unguided at 770mm is just too long then!! Looks like I have to buy a guidescope.
There wasn't even a slight breeze last night. It will be last last dark sky night tonight. I will try to get a series of shots of the whole worm gear period with the polar alignment out and maybe that will give up some clues.
I can't feel any unwanted movement either.