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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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B33 (Horsehead Nebula [test shot]) [obsolete]
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Image Details:
- Camera: SBIG ST-2000XM
- Mount: Astro-Physics 1200GTO
- Scope: TMB 152/1200 APO Refractor
- Configuration: Prime Focus
- Additional Optics: n/a (Prime)
- Filter: Astrodon Hα 6nm Filter
- Effective Focal Length: 1200mm
- Effective Focal Ratio: f/7.9
- Exposure: 2 × 32min @ -30°C (Hα)
- Total Exposure: 1hrs, 4min
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- Date: 12/14/2007 1:43 AM PST (Start)
- Location: Saratoga, CA, USA
- Acquisition: CCDSoft
- Focus: Manual
- Dithering: None
- Guiding: Self Guided
Processing:
- IRIS: Dark subtraction, registration
- JimP: Stacking, White balance, ASINH stretching
- Photoshop: Dust and Scratches, JPG conversion
Image Description:
This is a test shot of B33, aka, the “Horsehead Nebula”, a dark nebula in the constellation of Orion. This is Second Light for my new TMB 152/1200 APO Refractor and my new Astro-Physics (AP) 1200GTO German Equatorial Mount. I spent all night trying to get PoleAlignMax to work (note to self: make sure cropping is disabled in CCDSoft!), and then managed to get an hour or so of imaging in before I froze. The stars are elongated slightly in this image, and I think that's mostly due to the compression-ring-based extensions and adapters I was using which caused the camera to sag. I recently ordered some all-threaded extensions and adapters to eliminate this problem. This is Hα displayed as a grayscale image. Somewhat of a test shot, but neat enough to post. A higher resolution image is also available. North is left.