Overview

The Mamiya Sekor C 50mm f/4.5 is a wide-angle lens for RB67, praised for sharpness and contrast, especially at f/8–f/16 for landscapes and interiors. Build is solid aluminum with smooth rings, though no rubberized grip. Weaknesses include slight softness at f/5.6 and a floating element that requires careful setting, which can be tricky with a waist-level finder. It suits landscape and portrait photographers willing to practice to master its quirks.