Overview

The Pentacon 135mm f/2.8, originally the Meyer-Optik Orestor, is a vintage M42 lens known for smooth bokeh, especially the sought-after 15-blade version (the “bokeh monster”). It is sharp at f/2.8 and improves when stopped down, with vibrant colors and good separation. The all-metal build feels solid but can be wobbly with age. Manual focus and a long throw make it best for portraits, flowers, and macro, not fast action. It suits photographers seeking character and vintage charm at a low cost.