Overview

The Pentax SMC 6x7 55mm f/4 is a wide-angle lens for the Pentax 67 system, offering a roughly 28mm-equivalent field of view. Its third-generation optical design (8 elements in 7 groups) prioritizes sharpness, contrast, and correction across the 6x7 image circle, with improved flare resistance from SMC coatings. The f/4 maximum aperture is a deliberate trade-off for optical quality. Build quality is robust, with a practical 77mm filter thread. It suits landscape and architectural photographers who value optical performance over speed.