NGC6888 the Crescent Nebula in Cygnus
Full Frame, Imaged with an
AP 140 mm F7.5 Starfire EDF at F5.7
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NGC6888, the Crescent Nebula in Cygnus, taken with an AP 140 F7.5 Starfire EDF Astrograph Refractor with 4" focuser.
The instrument was working at F5.7 with the 155TCC Telecompressor Corrector.
STL11000 camera - 4 hours total exposure through Hydrogen alpha filter.
Although reduced to a manageable file size, this image is the full frame of the large STL11000 CCD chip.
Note the round, pinpoint stars at all four corners!
Image by Roland Christen.

Color version of the above image.

Cropped close-up image at full resolution.

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Last modified: August 24, 2007

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