CFW-10 Filter Wheel Off Axis

Discussion in 'Filter Wheels' started by Erich Beyer, Jan 20, 2015.

  1. Erich Beyer

    Erich Beyer Standard User

    Jan 20, 2015

    I have a CFW-10 filter wheel with a ST-10xme camera. The filter wheel is attached to the camera by replacing the window- as opposed to the nose block.

    The filter wheel is off axis. When a filter is rotated infront of the camera - instead of a blank - the image on the camera appears out-of-focus. More than just the typical doughnut, one side of the doughnut is bright, the other side is dark, and intensity varies between the opposite points. I am certain this is due to the filter being off axis from the camera-telescope optical system.

    Is there a procedure for re-positioning the filter wheel?

  2. Tim Puckett

    Tim Puckett Guest

    Dear Beyer,

    I am not sure what you mean. a blank vs a slot will a filter will always have a difference in focus.
    This is normal. Are you saying one of the filters could be tilted?
    If you can upload an image so I can see it would help.

    Scope collimation being off can sure change the brightness of the rings.
    Can you explain further or show a pic.
  3. Tim Puckett

    Tim Puckett Guest

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