from my personal exp with the 135mm's, the rodagon is minutely sharper @ f11, maybe. I honestly couldn't tell the difference in actual prints and my buddies couldn't tell the difference in the test prints. I did tests with both lenses from 8-16 and 11 was the sharpest with each lens. with that said the lenses may vary from specimen to specimen from what i've been told. i mostly took the rodagon over the componon-s because it's got an illuminated aperture. If your're looking for a 135 componon-s, i've got one for sale w/0 out a retaining ring. make an offer