Planetary Nebula M57 (NGC6720)
“Ring Nebula”

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<Image : Ring Nebula>
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<<Photography Data>>
Date: April 18th, 2004.
Location: Johoku, Ibaraki, Japan.
ASKO 400mm Newtonian (f2250mm F5.6)
ASKO SA-M Equatorial Mount
Canon EOS Kiss Digital (set up to ISO1600)
Exposure : 30sec. ×4 frames + 60sec. × 4 frames
(total exposure time : 6min.)
Image processed with StellaImage4 & The GIMP.
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