uneven lumination in STX16200 frame

Discussion in 'STX and STXL Series Cameras' started by Dave1act, May 17, 2021.

  1. Dave1act

    Dave1act Cyanogen Customer

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    I have the STX 16200 camera and I am using windows 10, 64 bit operating software. I have recently noticed that my images (exposures less then 5 minutes as shown below) have part of the frame unevenly illuminated. I am taking images in dark skies but still get this irritating illumination no matter where I point the camera. Can you tell me what is going on?
     

    Attached Files:

  2. Doug

    Doug Staff Member

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    Could you please post an unprocessed light frame and a matching dark frame, in FITS format?
     
  3. Colin Haig

    Colin Haig Staff Member

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    Also, please describe your setup - eg do you have an AO-X, FW8G-STXL self guiding filter wheel, which filters, and how connected to the telescope.
     
  4. Dave1act

    Dave1act Cyanogen Customer

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    Attached are the images you requested. I am using the STX 16200 with the AO-X and the SB-FW8G-ALUMA 8 filter wheel. Also I have a Astro-physics focal reducer 27TVPH in front of the camera
     

    Attached Files:

  5. Doug

    Doug Staff Member

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    The image you supplied is NOT unprocessed - it had a kernel filter applied.

    The dark frame doesn't look right - it's mostly all zeros.

    The bright pattern in the light frame looks optical - I can see shadowing in part of the frame.

    First step - update all drivers, firmware, and software.
     

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