OK... so how much does the seeming ever present to some degree Schneideritis to (older?) Schneider lenses effect their performance? Rodenstockitis, Zeissitis, and Nikkoritis seem to never be mentioned.

I've used (and still use) several vintage lenses with plenty of xxxxitis, subjectively without effecting the images they throw. Most of my exposures made a f/45 and f/64.... is the effect of Schneideritis less felt at these small apertures?