DSS help

[martin_h]

I processed a stack of subs last night and they are a right mess, Pic 1 shows a crop from the final stack. The calibration frames are ones I have used before.

So I did seperate stacks this morning using all combinations of lights, darks etc and came up with this - pic 2, which is a combination of Lights, Darks, and Flats - no Bias.

I have never had a problem using Bias frames in the stack before - any ideas?

[martin_h]

I re-shot all the calibration frames and it seems to have done the trick, I dont know why the other lot went belly up tho