怎么有十字光芒？不是ED镜吧，反射一类的还差不多！
ate/Location: December 27, 2005 Griffin/Hunter Observatory Bethune, SC
Instrument: Canon 350D Digital SLR (modified) through Orion ED80 w/ Meade .63 Focal Reducer piggybacked on RCX-400 (cross wires added for star effect)
Focal Ratio: Approximately f4.7
Guiding: Auto via SBIG ST237 through 10" Meade RCX-400
Conditions: Visually clear - thin clouds cut exposure session short
Weather: 40 to 32 F
Exposure: 151 minutes total (29 x 5 minutes @ ISO 800, 5 x 1 minute @ ISO 800, 5 x 10 seconds @ ISO 800)
Filters: Baader UV/IR block
Processing: Focused and captured with DSLRFocus. RAW to TIFF conversion, auto-dark and flat frame calibration, Digital Development, Richardson-Lucy deconvolution, resizing and JPEG conversion in ImagesPlus. Color correction in Photoshop 6. Noise reduction in Neat Image.
明显拍摄用的是10"的 Meade RCX-400，80ED只是导星用的！ |
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