Andy, › Forums › Spectroscopy › Master dark frame › Andy, 30 January 2017 at 9:37 pm #577879 Mr Jack MartinParticipant Andy, I will check the FITS header fields. Just checked MaximDL and its definitely a FITS file all saved as .fit files. The bias dark and flat field processing were followed in accordance with John Blackwells tutorials. Regards, Jack
