[avandonk]

Fred I want to experiment to reduce flair etc due to the optic and filters from bright stars such as in the images below. This can only be done by real modulated subtraction of data from the NB image with the data from the red continuum image. When there is no faint nebular detail present in the continuum image this should be relatively straightforward. We hope?

The aim is to reduce the secondary reflections and flair etc due to the optic and filters which mainly affects the very bright stars. Not to eliminate all stars. It was an idea that came to my fevered mind when I was reading about the continuum 5nm NB filter. In theory it should work for the colour data as well. This is only true if the optic has very little chromatic aberration.

A good area for this method would be suppressing the very bright stars near the Horsehead.


Bert