Used the 6 inch Schmidt Newtonian Cometracker tonight, with plenty of moonlight and the Ha filter to take the deepest Ha image Ive done with the 6 inch. 1.25 hours total
5x15mins ISO400, Idas uv/ir and Baader 7Nm Ha filters. MPCC coma corrector. 6 inch F3.6 meade Cometracker scope, hand guided. Image masked in Photoshop after processed with flats, dark and offset frames in Iris as usual. Hutech modded 350D used. Quickly processed will see if I can improve it later on. Would no doubt get less noise with a cooled camera, though as quite chilly wasnt too much noise visible in the dark frame tonight.
Scott
PS heres a larger version http://www.iceinspace.com.au/uploads...hmaskedbig.jpg
Thanks all. It definately pays to do an hour or more with narrowband imaging. I took about a dozen short 15 second test shots at ISO1600 to check focus, adjust and re check till stars were as small as I could get.
Scott
Thanks all. The masking technique definately helps. I save the original.pic image file in Iris as a .tiff then open it in Photoshop, using Levels to get a very bright image, burnt out in the bright parts, save that, the re open the original and use Levls to only show the bright parts, save that, and mask the dark one over the bright one, using this proceedure http://www.astropix.com/PFA/SAMPLE4A/SAMPLE4A.HTM