Quote Originally Posted by ChuckP View Post
I would say that a 120 APO-Symmar would have more light fall off compared to a 120 Super Angulon. The Super Angulon is a wide angle design that has less fall off.
Let’s see—if you go to the following link, you will find an information chart for Schneider lenses. The chart lists eleven different centerfilters made by Schneider for use with their Super-Angulons, older Super-Angulons and for their Super-Symmar Aspheric lenses. There are no centerfilters recommended for use with their APO-Symmar lenses.

https://www.schneideroptics.com/pdfs...LensCharts.pdf

So, according to your logic, Schneider does not recommend centerfilters for those lenses that really need a centerfilter, but does recommend them for those lenses that do not need them so much.