M51

[CaptainShiznit]

Probably the happiest I've been with a final image so far. I know it's not perfect but I'm still very happy with it. Would still be more than happy to receive criticism to improve!

54x180s guided @ISO800

10 dark / 30 flat / 50 bias

Stacked in DSS, processed in Photoshop

Gear in signature

[Danield06]

Looks good! Maybe you could use some dithering? 

[Waldemar]

I notice some spherical aberration on the left side of the image.
Since it is predominantly on the left side, I would think this is a tilt issue, probably caused by the weight of the camera. 
If you use a nosepiece for the camera, you may want to try a threaded connection instead.

B.R.

Edited March 29, 2020 by Waldemar

[CaptainShiznit]

6 hours ago, Danield06 said:

Looks good! Maybe you could use some dithering? 

I have APT/PHD set to automatically dither but I haven't looked at the settings. APT announces "dithering started, dithering finished" with very little time in between, between exposures. Do I need to look at the settings and increase the dither? If so, would that be in PHD or APT?

Cheers!

[Waldemar]

12 pix randomly in PHD seem to be the ideal dithering. If set in both APT as well as PHD that may be counter productive.