Overview

The Pentor 135mm f/2.8 Auto (M42) is a vintage telephoto lens with solid metal construction and a manual focus helicoid. Optically, it delivers a gentle softness and lower contrast wide open, producing flattering portraits with a dreamy glow when backlit. Its 15-blade aperture creates smooth, creamy bokeh, earning it the nickname 'bokeh monster'. Weaknesses include susceptibility to flare and a somewhat wobbly build in older copies. It suits portrait and flower/macro enthusiasts who appreciate manual focus and vintage rendering.