Hi
Conditions were better then they have been for a long time in Newcastle, dry, slight breeze to keep fireplace smoke down and rather cold. Took advantage of it to get this.
http://www.users.on.net/~josiah/baad...teredsmall.jpg
2 x 17 mins ISO 800 with baader UHCS filter.
10 inch F5.6 newtonian, unmod. EOS 300D
Off axis, manually, hand dec control guided.
I did a DF immediately after the 2 shots of same length (17 mins ISO 800). Manually subtracted this from the 2 shots separetly using Photoshop CS, then stacked them in CS as well. Used Gradient Xterminator photoshop plugin (no flat field done), levels stretching then default setting on Noiseware to finish off, then downsized image to show here.
Doing a DF immediately after a set of images gives better result than doing one some hours later on at the end of the nights imaging, I find.
Scott