Pentax HD DA 15mm f/4 ED AL Limited - Pentax K Mount

The HD DA 15mm f/4 ED AL Limited is a premium ultra-wide-angle prime for Pentax APS-C DSLRs. Featuring Extra-low Dispersion (ED) and Aspherical (AL) elements, it is designed to minimise chromatic aberration and distortion. The HD coating improves light transmission and reduces flare. Its compact, all-metal barrel construction is typical of the Limited series, offering a high-quality feel and a 23mm equivalent field of view. Look for smooth operation of the focus ring and ensure the built-in sliding lens hood moves freely. The front element is relatively exposed, so check carefully for scratches. SDS verifies the optical alignment and ensures the K-mount contact pins are clean and the aperture operates correctly through the camera's mechanical linkage.