Image:Nebula-Barnard's-Loop-bw-inverse.jpeg

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Nebula-Barnard's-Loop-bw-inverse.jpeg‎ (350 × 500 pixel, file size: 96 KB, MIME type: image/jpeg)

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Description	Barnard's Loop (catalogue designation Sh 2-276) is an emission nebula in the constellation of Orion which can be seen on the photo as a diffuse semi-circle. In this image the faint glowing hydrogen clouds spanning the whole constellation are visible. The photo was taken using the following equipement: Telescope: Nikon AF 85mm f/1,8 Film: Kodak Royal Gold 400 Exposure: 10 min at f/2,8 Processing: Removing Vignetting and Unsharp Masking, inverting and equalizing of the red channel with Photoshop English: Above photo of Barnard's Loop nebula in inverted black and white of the red channel; the loop can be seen now better
Source	Homepage of Homepage of Philipp Salzgeber http://salzgeber.at/astro/pics/orionbwinv.html
Date	29. Mar. 1997
Author	Philipp Salzgeber
Permission	Philipp Salzgeber released the pictures under CC-BY-SA-2.0-AT, see bottom of http://salzgeber.at/astro/thumb.html (and before he also gave me the personal permission at forum.astronomie.de for GFDL-free usage)
Other versions	Image:Nebula-Barnard's-Loop.jpeg (original color version)