Overview

The HD Pentax DA 15mm F4 ED AL Limited is a compact, well-built prime lens with a distinctive drawing style. Optically, it offers low distortion and vignetting, but sharpness is modest wide-open, improving significantly by f/5.6 (DPReview notes similar). Curvature of field and decentering can affect edge sharpness. Flare control is good, especially with the sun outside the frame. Chromatic aberration is visible but correctable. It suits Pentax enthusiasts seeking a small, high-quality wide-angle for landscapes or street photography, though zooms like the Tokina 12-24mm may be sharper.