Butterfly and Crescent Ha

[Allinthehead]

This is 1 hr in 20 second subs at gain 399 and offset 50 cooled to -20. Taken last night.

Zwo Asi 1600mm.

Samyang 135mm f2 on an Az Eq6 mount.

Astrodon 5 nm ha filter.

Stacked in dss and processed in ps. Master dark used. Initial stretch using levels, curves. Noel Carboni's star reduction, and local contrast enhancement. Noise reduction using ps, and selective sharpening using a layer mask.

Richard.