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M51
4.4 hrs total.
I have a few filters and I'm trying to decide which is the best for the city. This was shot with a Meade Nebula filter #911. Exposure times are drastically increased, and surprisingly so was the noise... though that may be due to light pollution
Albums: AP in the Suburbs
Location: Winnipeg, MB, Canada
Comment
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Comment by Kevin Galka on March 27, 2011 at 10:27am
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Interesting... I did run flats on this as I have a dust bunny hidding somewhere in my optical train. I should try and reprocess without the flats and just hide the dust. I have Noel's tools and tried running the remove vertical and horizontal lines, and to some extent it worked, but not completely. I think I may need to try layers to completely remove the background (with out loosing the faint wisps of M51). I'll repost if I can get rid of the background noise.
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Comment by Marc Basti on March 27, 2011 at 5:04am
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Kevin, the way that noise is so patterned (vert horz) it almost looks like something happened during the debayering process(?) And/or I had a similar thing happen w/some flats I took through a t-shirt that didn't calibrate right for some reason (never figured it out). Marc PS minus the nse, 51 came out nice.
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