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  1. #1
    Join Date
    Jan 2013
    Bourne, MA

    Default AutoFlat.vbs, first flat for a filter often bad

    I've attached an image of a bad flat, wondering if anyone else has see this kind of anomaly.

    - Flats taken with AutoFlat.vbs
    - The the image looks like the top quarter is from a different exposure
    - This only happens to some of the first flat shots of a filter sequence, right after there has been a 64x64 test shot.
    - camera is ZWO ASI-183

    Any thoughts?
    In theory the median filter applied to the flats would skip this.

    Right now I have a hack in the AutoFlat.vbs to redo the first shot in a sequence.

    Attached Images Attached Images



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