M5 : 無料・フリー素材/写真
M5 / s58y
ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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説明 | Subject: M5Image FOV: 1 degree square (60 by 60 minutes)Image Scale: 4 arc-second/pixelDate: 2009/05/30Exposure: 12 x 5m = 1 hour total exposure, ISO800, f/5.6Filter: IDAS LPCamera: Hutech-modified Canon 30DLens: Nikon 800mm f/5.6 AISMount: Astro-Physics AP900Guiding: ST-402 autoguider through SV66 guidescope, Maxim DL autoguiding software with 6-second guide exposuresProcessing: Raw conversion and calibration with ImagesPlus (dark and bias frames only, no flat frames); Aligning and combining with Registar. Final processing (levels adjustment, cropping, resizing, JPEG conversdion, etc.) in Photoshop.Remarks: Temperature = 50F/39F start/end; SQM-L readings: start/end = 20.40/20.49 (half moon) |
撮影日 | 2009-05-30 00:00:00 |
撮影者 | s58y |
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