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December: Test shots with new scopes/mounts
Dec 21: TMB 80/480 Arrives!
Dec 3: AP1200 Arrives!
Nov 30: TMB 152/1200 Arrives!
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M8/M20 (Widefield)
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Image Details:
- Camera: Mofidied Canon Rebel XT (350D): Hutech Type I Filter Replacement
- 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: 16 x 4min @ ISO 200
- Total Exposure: 1hrs, 4min
-
- Date: 8/23/2005 9:07:47 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
Processing:
- IRIS: Dark subtraction, registration
- JimP: Flat field, Kappa-Sigma Stacking, White balance, ASINH stretching
- Photoshop: Levels, image scale, JPG conversion
Image Description:
This is "First Light" for my brand-spanking-new Canon EOS Digital Rebel XT (350D), modified by Hutech to remove Canon's standard "IR Blocking" filter which, unfortunately, blocks a lot more than Infrared. In particular, it blocks much of the Hα wavelength, that deep red color found in emission nebulae et. al., which is so prominent throughout the universe. This Hutech mod is a replacement of that standard filter with their
Type I astronmical filter which only blocks IR and UV but lets the Hα wavelength pass. The camera was a 40th Birthday present from my dear wife, Lyena. She totally rocks!Anyway, this is a well-traveled field in Sagittarius containing two of the showcase Messier objects of summer: M8 (the Lagoon Nebula) and M20 (the Trifid Nebula), plus the NGC 6559 Region that Rich and I recently shot with his modified 300D. Moonrise limited the exposure time to just over an hour. More would have been better, but the reality is that this was just a test shot to make sure all of the hardware and software was functioning. This is the full frame, shrunk for display on the web. A full resolution image is also available. North is right.