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  1. #1
    Join Date
    Nov 2005
    Virgil, NY

    Default Autoflat problem of my own

    Jim (McMillan),

    I've got a problem with my autoflats, too. And I know that I had this problem years ago, but I can't quite remember the way out of this paper bag.

    I took lots of flats/darks/bias images the other night - it's been eight months since I did this last, loaded them into MaxIm with SetCalibration, and did the usual combining (click on Auto-Generate (Clear Old), followed by Replace w/Masters.

    When I calibrate a raw image ("Raw"), the image gets almost completely black ("Cal"). This is some kind of scaling issue, but I just can't recall where the solution lies. Can you help me? The Raw exposure is about 50 seconds; the "dark" calibration frames are 600 seconds. There are 6 each darks in bins 1, 2 and 3.

    Attached Images Attached Images
    Pier-mounted Meade 12-inch SCT "classic"
    w. focal reducer to f/5.3 ~ FL 1630mm
    Optec TCF-S focuser
    SBIG CFW-8A and ST7-XME
    FOV ~ 15' x 10'
    H-alpha, BVRI, RGB & Clear filters
    MaxIm and, of course, ACP!
    AAVSO Code: BRIC



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