Colour Cast Problem!!

dcalleja · #1 29-03-2009, 01:24 PM

Hi
I've uploaded an image of Omega Cent from last night which has a really bad green cast (you'll see it as a ring around the glob which I've exagerated for illustration). I cant seem to process it out. Details are:

Flats and Darks in CCDStack
Convert Raw to colour in CCDStack
Stack
Process in CS3 with normal curves and levels

The image has also been reduced to fit for upload

If anyone has any clues I'd be grateful

bluescope · #2 29-03-2009, 01:53 PM

Why not just convert it to greyscale and don't worry about the colour

The most common reason for strange colour casting is light polution .... are you using a LP filter ?

dcalleja · #3 29-03-2009, 02:01 PM

Steve
Yes an Astonomik CLS. It usually works really well which is why I'm puzzled.

dcalleja · #4 29-03-2009, 03:23 PM

I think I managed to stuff something while trying to remove hot pixels. At any rate this version looks better. Thanks for your suggestion Steve.

Cheers

bluescope · #5 29-03-2009, 03:27 PM

That looks much better ... still a slight green tinge but much better !

dcalleja · #6 29-03-2009, 03:35 PM

Thanks Steve. I love looking at this glob. Never ceases to amaze me.