I bought a 2 inch camera adapter and decided to try it without the 1 1/4 inch UHC filter I have been using. That proved it was the 1 1/4" assembly that was causing the terrible vignetting I was getting. The trouble is, light pollution is a problem and I wasn't able to take exposure of longer than 45s. So, I took a lot! Here are the two fruits of my endeavors, one more juicy than the other:
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| Orion Nebula M42 in Orion. 45 x 45s , plus lights, darks and bias |
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| Crab Nebula M1 in Taurus. 150 x 45s , plus lights, darks and bias |
The M1 photo is a heavy crop and the processing looks much poorer than the M42. I guess because its a fainter object and with my camera being ummodded plus the short exposures, there is not a lot fo data there really.
Next time.... my new 2" Baader Neodymium filter should have arrived so I can try the same with longer exposures.
