Quote:
Originally Posted by Hagar
Very nice Steve, Longer subs is the way to go. How is you mount progressing? Guiding and longer subs will leave us all gasping at your results.
Keep at it Mate.
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Thanks Doug, sorry we haven't caught up for a while, the mount
is ready for the worm-changeover on the RA axis right now.
See the
worm hobbing thread in ATM.
Doing the changeover will be quite a big task....it will take the
scope out of action for a few nights while I mount it all in place
and it replaces the current spur gear gearbox/stepper arrangement.
Then the real acid test begins...a few nights of testing it's positional
accuracy around the full circumference of the worm gear.
If it's terrible and can't be PEC corrected, it's coming straight back
off and back to the spur gears.
I can EASILY get 10-15sec subs on a night of exceptional seeing
but 5 second subs freeze the seeing on poor to good seeing nights.
The info is all there right down the bottom end of the histogram
if it's a coold night and the noise floor is good.
I'm flabbergasted why people aren't doing this more....at least with
big light buckets attached, certainly doesn't need autoguiding on
a permanent setup with good polar alignment.
I do a hand corrected nudge in Dec and/or RA probably every 5 mins
or so with these sets which take about 45mins to an hour.
That's not bad tracking!
Quote:
Originally Posted by peter_4059
Nice capture Steve.
It looks like you've acquired a dust spot on the left in your more recent images - any plans to clean the DSI or go for flats? My tip is go easy on the iso-propyl alcohol.
Peter
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Yes Pete, I have noticed it too.
I'm just lazy and haven't removed it yet.
I think it's on the Baader IR in the filterwheel.
Steve