I have been trying to use IRIS (version 5.59) to process Canon raw images but have run into a problem. The fits headers have missing and incorrectly formatted information. Notice the incorrectly formatted date/time entry. Also, IRIS is using the focal length as the exposure time!. I like some of the features of IRIS and would like to use it but I do not know what to do to fix this.
For instance, the following is part of the fits header when the raw file is converted to fits by AIP4Win:
SIMPLE = T / file does conform to FITS standard
BITPIX = 16 / number of bits per data pixel
NAXIS = 2 / number of data axes
NAXIS1 = 5202 / length of data axis 1
NAXIS2 = 3465 / length of data axis 2
EXTEND = T / FITS dataset may contain extensions
BZERO = 3.49100000000E04 / Real = FITS_value * BSCALE + BZERO
BSCALE = 1.00000000000E00 /
OBJECT = '*'
INSTRUME= 'Canon EOS REBEL T3i'
DATE-AVG= '2020-11-17T19:43:07.000'
EXPTIME = 120.0000 / Exposure (integration) in seconds
DATE-LOC= '2020-11-17T19:42:07' /LT
FOCALLEN 135.0 mm
FOCALRAT f/4.6
ISOSPEED 800.0 ASA
This is what I get when I use IRIS to convert the very same raw image:
SIMPLE = T
BITPIX = 16
NAXIS = 3
NAXIS1 = 5202
NAXIS2 = 3465
NAXIS3 = 3
MIPS-HI = 13584
MIPS-LO = 0
MIPS-X1 = 0
MIPS-Y1 = 0
MIPS-X2 = 0
MIPS-Y2 = 0
MIPS-BIX= 1
MIPS-BIY= 1
MIPS-CCD= 0
MIPS-FL = 0
MIPS-SX = 5202
MIPS-SY = 3465
MIPS-NOR= 1.000000
MIPS-CST= 0.000000
DATE-OBS= '18/11/2020'
UT-START= '00:42:07'
EXPTIME = 135.0000
END
Anyone know how to deal with this? Thanks, Rick
I'm using IRIS and I don't hane this problems.
This is my setup: