Quote:
Originally Posted by mswhin63
Hi James, I would go as low as 800 ISO and I mostly use 1600 and take many more shots. to reduce the noise levels in the final stack.
I have the same type of mount although believe mine is a cheap EQ2 not a 3.
Last night I captured 2 minutes x 19 exposure at 1600 ISO and night before 90 second at ISO 800 and worked well. Unfortunately I cannot post the link to my site as I upgraded the skin and it is not working. I will fix it today and hope show you the result.
I still experience slight drift even after 90 seconds though. They are not the best of mounts for AP.
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The long exposures are purely for the alignment - before i leave the camera to image proper, i will usually take a set of images ranging from 30 seconds up to 300 seconds, with varying ISO's, preview them to see whats the longest exposure i am happy with, then leave the camera clicking away while i do other things - i will periodically check to see if a building, etc has drifted into view, (or clouds, or greyed-out image from dew). Also, i will usually recharge my laptop and camera batteries bfore imaging proper. And i'm also starting to bring the whole camera inside to warm up again (damn dew!)