Lens Lab
    Serenar 50 mm f/ 3.5 I
    Serenar 50 mm f/ 3.5 I

    Serenar 50 mm f/ 3.5 I

    50mm · f/3.5

    Overview

    The Canon Serenar 50mm f/3.5 I is a collapsible Leica Thread Mount lens, historically significant as Canon's first in-house lens. Optically, it is a Tessar-type design with four elements in three groups. It delivers good sharpness, especially by f/5.6, with moderate contrast and slightly muted colors. Weaknesses include slight vignetting at wide apertures and evident diffraction when stopped down fully. Build is solid brass with smooth manual rings, though the collapsible mechanism extends further than similar lenses. It suits vintage rangefinder enthusiasts and those seeking a compact, classic rendering lens.