M31 processing

[wimvb]

My try at this (very quick and dirty)

Pixinsight:

crop & dbe to reduce gradients

background neutralisation & colour calibration, using star field for white source

masked stretch x 4 up to a median level of 0.35 with 0 clipping followed by histogram transformation to bring the black point in

colour saturation with mask to protect background, several iterations

curves transformation

downsample and save

[wimvb]

6 hours ago, StargeezerTim said:

Thanks Wim...

It's the clip in rather than the visual but i think the transmission curve is the same or similar. To be fair to myself, i would have removed it if i was targeting it from the start of the session but i just went there when the veil disappeared and i was too tired to re-focus!

Tim.

The clip in filter is just different mechanically. The glass is the same, I think. For some of the filters on the Astronomik website, when clicking on the clip in filter for detail, you get redirected to the screw in filter for visual. So, I think they're basically the same.