star control with pixinsight

[waynef]

I am having difficulties with a new data set from a new scope(doublet refractor).My red channel's star are larger that the green and blue.I have been trying to use a combination of deconvolution and MMT to reduce the star size in the red channel to get it closer to the other two channels so that when I combing the channels I do not end up with the red halo's, however this is very tricky.
I was wonder if there is not a pixel math method that could somehow  do the channel combination but not add the extra red channel information on the stars where there is none for the green and blue channel due to their smaller sizes?

[lucchett]

Hi,
Have you tried to add a step with MT through a star mask?
Ps: change the focus by filter should bring you to a much easier situation ( I think it is Somithing to try.
Andrea

[waynef]

Thanks this indeed did improve the situation as can been seen from the attachment.There does seem to be a slight shift towards the blue now.I still need to experiment with the curves to see if I an correct it