Pickering's Triangle

[powerlord]

I'd have like longer on this, but the weather didn't play ball. 3 hours of 10 min subs with my 200pds, asi2600 and L-ultimate.

It's a bit noisy, but noiseX was just mushing it up when I tried any more noise removal, so I've left it as is - still lots of fine detail in there.

[Stuart1971]

Lovely image 👏🏻👏🏻

But why such long subs with that camera, after about 5 mins you are just adding more noise and LP….

[powerlord]

I tend to mostly shoot 10 mins subs with the L-ultimate - it's a 3nm dual band.  10 mins vs 5 mins seems visually obviously better to me ? Surely it depends on aperture, target brightness and a bunch of other stuff ? I just tend to stick with what works for me - clear skies are rare enough without using ones to experiment with when things are already working. The only time I drop em to 5 mins is if I'm imaging somewhere with a very high FL and struggling to get a low enough guide RMS.

Edited October 24, 2023 by powerlord

[Stuart1971]

28 minutes ago, powerlord said:

I tend to mostly shoot 10 mins subs with the L-ultimate - it's a 3nm dual band.  10 mins vs 5 mins seems visually obviously better to me ? Surely it depends on aperture, target brightness and a bunch of other stuff ? I just tend to stick with what works for me - clear skies are rare enough without using ones to experiment with when things are already working. The only time I drop em to 5 mins is if I'm imaging somewhere with a very high FL and struggling to get a low enough guide RMS.

Hmmm, the thing is you probably get even better results with a lot more shorter subs of 5 min or even 3 mins, with that size scope,  and if you have to lose any subs, better to lose a 3 mins sub that a 10 min one…these modern CMOS cameras, only really need enough exposure time to swamp the read noise of the camera, any more is just not worth it, so in Your case 3 mins should be enough…

Its worth trying…👍🏻

[windjammer]

>>It's a bit noisy, but noiseX was just mushing it up

I ran it through Topaz Denoise - cleaned it up a bit. Topaz is very effective, a plugin for PS and Affinity photo.  They do a free trial if you want to try it out.

Simon