recently purchased a Canon model 7D DSLR camera and I can tell you
it is fantastic. It has an APS-C sensor with 18 million effective
pixels at 4.3 microns each.
have not used it very much yet and M42 is my very first
astrophoto. I will tell you it has beaucoup user controllable
variables. Of course that means, at least for me, a steep learning
curve. But we're getting there. The M42 image has only a
total of 5 1/2 minutes of JPEG data. This lean amount
of the acquired data was due to my learning curve as well as the
extremely freezing temperature. (The camera was O.K.
I wasn't). I did put a hand warmer in a towel and wrapped it
around the camera since I didn't know what effect the cold would have on
it. I should have wrapped it around my hands. What? No
gloves Bob? No, I won't be that long...........
I hope I'm not alone in feeling the image came out well considering the