I never really noticed Chromatic Aberration or CA, until I got a refractor scope. Then, I noticed some eyepieces also cause CA. A good example is my Meade 4000 8-24mm zoom eyepiece. I had problems focusing zoomed in to high magnification and the problem turned out to be CA. I even had the same problem using the zoom in my reflector scope. I though something was wrong with the eyepiece. The real problem was CA. I started using a Baader Contrast Booster Filter and now the CA is practically gone. I looked at the Moon tonight with the zoom eyepiece and the Contrast Booster filter. Zoomed in all the way, I hardly noticed any CA at all. I see CA using a cheap SVBony 23mm Aspheric eyepiece without the filter and with inexpensive Barlows without the filter too. Now I keep the Contrast Booster filter attached to my refractor's diagonal all the time. I'm curious to try this filter with these eyepieces in my reflector scope sometime. Anybody else notice eyepiece CA before?
Edited by penguinx64, 18 April 2019 - 01:53 PM.