Flat Contour Plot

updated: 2023-11-29


This script helps to check the optical equipment for alignment problems and dirt


Script > Image Analysis > Flat Contour Plot


Any flat frame




  1. Open a flat frame (or a master flat frame9
  2. Open FlatContourPlot

    and select the open flat frame, leave all other settings.

  3. click on Render to start the analysis - if the resulting plot looks like this everything is well aligned in you optical train and also no dirt either on the sensor, the filter or the reducer. You should see a similar vignetting at all 4 corners of the image, otherwise your camera is not well centered.

  4. If the resulting plot looks like this you should consider cleaning your optical equipment!

Created with the Personal Edition of HelpNDoc: Transform Your Documentation Process with HelpNDoc's Project Analyzer