Great pics! Good to see such high quality longer focal length shots from an AstroTrac. I also love mine.
Quote:
Originally Posted by seeker372011
Hi Houghy
Usually 90 second subs and about an hour or so in total. Once the astro trac runs out of track and needs to be reset I find it impossible to reframe the target exactly, so am limited by that in terms of total exposure.
I am drift aligning
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How long do you spend on the drift alignment?
Regarding re-framing. I find it easy because I have a ball joint between AT and camera which has two separate adjustments for rotation vs other directions. As such I can rewind the AT then unlock the rotation of the ball joint and rotate it back the appropriate amount (30 degrees if it's the full 2 hours but I usually base it on a star's position in one far corner of the FOV). Just a tip in case you haven't tried that. It's not perfect but it's easy to get very close and there's only variation in the RA because I won't have adjusted it in other directions.
Regards,
Roger.