The famous Ring Nebula, imaged using the horribly bad .33 focal reducer. I had to reduce the size of the image just to cover up the extended coma. The field of view with this focal reducer is great, but because the vignetting and coma is so severe, if not resizing it I would have to crop the image so extensively that I could as well just use the .63 focal reducer!
2003-03-06: 3 minute exposure (3x60s). Camera cooled to -20°C.
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