Wednesday, April 16, 2008

Highest Resolution Moon So Far


It was a clear night tonight and the seeing was forecasted to be ok. I decided to try photographing the moon with the most reach yet. Along with stacking tele-converters, I also used the 12mp Rebel XSi with a 1.6x crop factor (giving a FF equivalent of 2688mm). As a basis for comparison, an 8" f/10 SCT has a focal length of about 2000mm. I wasn't expecting great results, but I was pleasantly surprised with what I got. Now at this magnification even very good seeing still results in a lot of scintillation and distortion.

If you click on the image above, in the full size version the embedded image is a 100% crop. I think shooting through the telescope will be the next thing to try.

Technical Specs: Canon Rebel XSi (450D), 600mm + 1.4x + 2x (1680mm eqiv.), f/10, 1/100s, ISO 400.
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