Quote:
Originally Posted by Startrek
Marc,
Just following in from your advice, I was imaging the Tarantula last night in Sydney
Started imaging the nebula at 33 degrees Alt , guiding was good at 0.80 arc sec total , improved to 0.70 at 40 degrees and ended up at 0.63 at 47 degrees , stayed excellent until high cloud rolled in around 1.30am and called it a night
My Skywatcher mounts, years ago with the HEQ5 (both main and worm gear driven ) and in the last 3 years with my two EQ6-R mounts ( belt and worm gear driven ) at both Sydney and South Coast have always guided well near the south meridian / SCP.
Just thought I’d mention my experiences
Cheers
Martin
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For sure if you have very little or no backlash in RA with your mount it is a non issue. Guiding close to the SCP is also always easier. The only thing that can become a problem is field rotation but generally guiding is better.