Overview

The Canon FL 19mm f/3.5 R is a rare 1960s ultra-wide-angle lens known for low distortion and a retrofocus design that avoids mirror lockup on SLRs. Optical strengths include flat field and sharpness, though some sample variation may cause slight bowing at edges. Build is solid, with a large but manageable package. It suits photographers seeking a unique vintage wide-angle for interiors or flat-field work, but its rarity and filter challenges (Series IX) may limit appeal.