The f8 Super Angulon does not have the coverage you need for movements. All of the current Rodenstock and Schneider 90mm lenses are high level and do cover. f6.8 is OK if you don't need the extra speed. I have had the 5.6 and 6.8 Schneiders and actually prefer the 6.8, both for the performance and the lighter weight. The Rodenstock f4.5 is my current 90mm, and I like it best of all, though if I had to carry it around would rather have the 6.8.