[Keshdogga (Casey)]

Hey all,

I've been having trouble with dusk and specles on my CCD and telescope and to combat it i've bought a light box to take flat frames with. I get great big transparent blobs all over my image that i thought flat frames would retract however It just doesn't seem to be working to the fullest extent. The blobs are only slighty reduced.

I'm guessing that i'm taking flat frames with the wrong exposure time and i would really like to hear another person's experience with light frames.

Also, seeing as I use Deep Sky Stacker to combine images, is the appropriate time to combine the flat frames in the initial image stacking process or is it done after the image is combined/post processing?

I will post some photo's later today to make what i'm saying more clear.

Cheers,
Casey