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28.8' x 26.9'
23.5 Million light
Hyperion 12.5" Astrograph
ST-402 - OAG
1 x 1
Luminance: 6 x 10-min frames
Acquisition with CCD Commander & MaxIm DL
Calibration with CCD Stack
Processing with Adobe CS4
Only had a short time before M101 disappeared behind the trees but the weather was finally nice
Guiding was good with about 0.55 rms error for the RA axis.
The image above is at 50% scale and one can notice the imperfect collimation, especially at the lower right corner of the image.