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Old 20-09-2018, 11:28 AM
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LewisM
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H-a tonight

I hope!

Since the Moon really yakked out my images the last 2 nights, I am going to strap on (errr...attach) the H674 mono with the 2" 7nm H-alpha tonight and doing something wild and wooly...

So, I do 10 min subs colour. Should 30 min subs be a good starting point for 7nm images? Not sure I want to go 1 hr subs just at the moment
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Old 20-09-2018, 11:52 AM
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RickS (Rick)
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You should get reasonable results from shorter subs since you're at f/5, the pixels aren't tiny and the read noise is moderate, but if you can guide well enough then by all means go for 30 minute subs.

Cheers,
Rick.
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Old 20-09-2018, 12:46 PM
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LewisM
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Thanks Rick.

Yeah, it guides well enough - I'll give it a crack!

(just for Suavi's sake, I turned off guiding to do the cal frames last night. 3 hrs of those later, and NGC55 was still centre of crosshairs in MaxIM I didn't bother with a guide graph though...pointless )
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