本帖最后由 北京巡天 于 2010-2-22 12:35 编辑
- Exposures: Red(180s), Green(188s), Blue(300s) @ f/5.6
- Lens: Pentax 300 mm f/4.0 EDIF
- Camera: FLI PL-16803
- Filter: Astrodon Red, Green, and Blue
- Location: Pendleton, Oregon
- Date: 03-Aug-2008 @ 2226 PDT
- Calibration: Maxim DL
- Processing: PixInsight Standard and Photoshop CS3
- Notes: Twelve images were taken through each color filter for a total of 36 images; the filtered images were sigma-summed in Sigma; Registar counted 120,000 stars; M27 is located in the lower right.
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o Exposures: Red(180s), Green(188s), Blue(300s) @ f/5.6
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