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Old 02-08-2021, 06:43 AM
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PKay (Peter)
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M8 - Sample image in Ha

Trying to work out optimum exposure length, camera gain, framing etc, processed only 6 X 300s subs.

I was quite amazed at the result!

The goal is to produce a SHO image comprised of 30 X 300s each filter.

Comments welcome, I am still learning
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Old 02-08-2021, 09:17 AM
AdamJL
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Hi Peter

300s is a good point for this nebula, depending on where you're shooting from. This is nice work! Your stars are a little unfocused, but you're off to a cracking start
Looking forward to seeing what you get out of this one.
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Old 02-08-2021, 11:39 AM
Startrek (Martin)
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Peter,
Yes a great start but if you were out last night after the rain cleared, seeing and transparency were terrible as humidity was up around 85 to 90% and looking up stars looked like they had halos around them. I didn’t bother imaging as focusing would have been frustrating
Good start anyway
Core looks good and well detailed but outer region looks a bit dark which is hiding a lot of detail and nebulosity
I use 180sec subs for nebula and lots of them with my 2600MC and L Extreme, a sweet spot , I’ve never had to go to 300sec to expose detail
Look forward to your end result
Cheers
M
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Old 02-08-2021, 05:28 PM
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Wilsil (Wilco)
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Hi Peter, nice image.
I am using the 300s for my imaging as well.
The QHY268M works really well with that exposure.
I must say that I haven't tried any longer.
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Old 02-08-2021, 10:31 PM
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PKay (Peter)
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Quote:
Originally Posted by AdamJL View Post
Hi Peter
300s is a good point for this nebula, depending on where you're shooting from. This is nice work! Your stars are a little unfocused, but you're off to a cracking start
Looking forward to seeing what you get out of this one.
Thanks Adam, the focus may have been excessive moisture, I use an EAF.

Quote:
Originally Posted by Startrek View Post
Peter,
Yes a great start but if you were out last night after the rain cleared, seeing and transparency were terrible as humidity was up around 85 to 90% and looking up stars looked like they had halos around them. I didn’t bother imaging as focusing would have been frustrating
Good start anyway
Core looks good and well detailed but outer region looks a bit dark which is hiding a lot of detail and nebulosity
I use 180sec subs for nebula and lots of them with my 2600MC and L Extreme, a sweet spot , I’ve never had to go to 300sec to expose detail
Look forward to your end result
Cheers
M
Thanks M, yes it was so wet I had to pull out the hair dryer (which lives in the observatory).
Might give 180s a go and see what difference it makes.

Quote:
Originally Posted by Wilsil View Post
Hi Peter, nice image.
I am using the 300s for my imaging as well.
The QHY268M works really well with that exposure.
I must say that I haven't tried any longer.
Thanks Wilco, there is so much written about exposure time, I have found the 'suck it an see' principle works the best
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Old 12-08-2021, 08:56 AM
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multiweb (Marc)
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Missed that one. Those round stars are to die for. It is a little grainy and I'm not sure if it's noise or if that happened during the processing. Contrast seems a bit pushed so hard to tell but you definitely have the image scale and stars for much deeper details. Maybe worth a repro I reckon to see more.
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