Overview

The Porst 135 mm f/2.8 Tele MC auto D is a rebranded lens, likely manufactured by Cosina. Optically, it offers good sharpness for portraits on full-frame and wildlife on APS-C, but suffers from strong chromatic aberration, especially blue fringing wide open. Build includes an integrated pull-out hood and full manual controls, making adaptation to mirrorless cameras easy. It suits photographers comfortable with stop-down metering and willing to correct aberrations in post.