その１２０ ボーデの銀河 M81 とM82
春の夜空を代表するM81とM82を撮りました。２台同架
EOS R5 + EF400mm f/2.8L IS II USM +2x III 800mm
EOS R7 + EF400mm f/5.6L USM + ADAPTER EF-EOS R 0.71x 284mm
EOS R5 + EF400mm f/2.8L IS II USM +2x III 800mm
EOS R7 + EF400mm f/5.6L USM + ADAPTER EF-EOS R 0.71x 284mmトリミング
（天体情報）
DATE = '2023-05-11T00:39:18' / UTC date that FITS file was created
DATE-OBS= '2023-05-09T11:49:41' / YYYY-MM-DDThh:mm:ss observation start, UT
INSTRUME= 'Canon EOS R5' / instrument name
OBSERVER= ' ' / observer name
TELESCOP= ' ' / telescope used to acquire this image
ROWORDER= 'BOTTOM-UP' / Order of the rows in image array
XPIXSZ = 2.2 / X pixel size microns
YPIXSZ = 2.2 / Y pixel size microns
XBINNING= 1 / Camera binning mode
YBINNING= 1 / Camera binning mode
FOCALLEN= 783.691 / Camera focal length
CCD-TEMP= 0 / CCD temp in C
EXPTIME = 180 / Exposure time [s]
STACKCNT= 42 / Stack frames
LIVETIME= 7563.4 / Exposure time after deadtime correction
FILTER = 'mixed ' / Active filter name
APERTURE= 5.6 / Aperture of the instrument
ISOSPEED= 1600 / ISO camera setting
DATE = '2023-05-10T12:10:34' / UTC date that FITS file was created
DATE-OBS= '2023-05-09T11:50:27' / YYYY-MM-DDThh:mm:ss observation start, UT
INSTRUME= 'Canon EOS R7' / instrument name
OBSERVER= ' ' / observer name
TELESCOP= ' ' / telescope used to acquire this image
ROWORDER= 'BOTTOM-UP' / Order of the rows in image array
XPIXSZ = 1.6 / X pixel size microns
YPIXSZ = 1.6 / Y pixel size microns
XBINNING= 1 / Camera binning mode
YBINNING= 1 / Camera binning mode
FOCALLEN= 278.599 / Camera focal length
CCD-TEMP= 0 / CCD temp in C
EXPTIME = 180.1 / Exposure time [s]
STACKCNT= 46 / Stack frames
LIVETIME= 8267.8 / Exposure time after deadtime correction
FILTER = 'mixed ' / Active filter name
APERTURE= 4 / Aperture of the instrument
ISOSPEED= 800 / ISO camera setting
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