SaratogaSkies Jim Solomon's Astropics


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SH 2-27 (Emission Nebula West)

Mouse-over to see annotations. (Requires Javascript) Click to see high-res version.

Image Details:

Camera: Mofidied Canon Digital Rebel (300D): Hutech (no filter)
Mount: Celestron AS-GT
Scope: Canon EF 200mm f/2.8L II USM lens
Configuration: Prime Focus
Additional Optics: n/a (Prime)
Filter: None
Effective Focal Length: 200mm
Effective Focal Ratio: f/2.8
Exposure: 33 x 4min @ ISO 200
Total Exposure: 2hrs, 12min
Date: 7/6/2005 10:33:03 PM PDT (start)
Location: Saratoga, CA, USA
Acquisition: DSLRfocus
Focus: DSLRFocus
Dithering: Manual
Guiding: GuideDog via Philips ToUcam Pro II (840k) through Orion ST80 w/ Celestron 2x "Kit" Barlow


  • IRIS: Dark subtraction, registration, gradient removal
  • JimP: Flat field, Kappa-Sigma Stacking, White balance, ASINH stretching
  • Photoshop: Levels, image scale, cropping, clone tool, JPG conversion

Image Description:

This is the Western portion of SH 2-27, a very large but very faint emission nebula in the constellation of Ophiuchus. Thanks much to Rich S. for bringing over his Modified 300D and 200mm lens.

Move your mouse over the image above to see annotations of the various dark-nebula regions, or click on the image for a higher-resolution version. The image above is the full frame, shrunk for display on the web. Check out the Eastern portion of SH 2-27 as well. North is right.