Chromatic Aberration with DSO's?

[harshit8]

Can chromatic aberration be an issue when imaging bright DSO's like Orion Nebula or Andromeda Galaxy (with a DSLR).

TELESCOPE- Bresser 90mm Achromatic Refractor

[happy-kat]

It could be but StarTools has a reasonable filter to help tidy away the CA which is what I do/use

[wimvb]

It certainly does affect the image quality. But mostly on multicoloured or 'white' and bright targets. If your main target is a cluster, you're in trouble.

One way to lessen its effect is to seperate the rgb channels and align and recombine them. It's also possible to correct it in the subs. I have done so on occasion with Raw Therapee, before stacking. In case you don't use Startools as @happy-kat suggested.