Overview

The HD Pentax DA 21mm F3.2 AL Limited is a compact, metal-bodied pancake lens weighing 134g. Optically, it delivers very sharp images, especially at f/8, with low distortion (0.5% barrel) and well-controlled vignetting that clears by f/5.6. Chromatic aberration is generally well-handled but can be noticeable in corners. Build quality is excellent with metal parts. It suits Pentax APS-C users seeking a portable, everyday wide-angle lens, though it's not ideal for macro.