The Pentax SMC DA* 300mm f/4 ED SDM is a high performance telephoto lens designed exclusively for use with Pentax APS-C DSLRs.

Its combination of a 35mm-equivalent focal length of 450mm and f/4 aperture make it a great choice for sports and wildlife shooters. The DA* 300mm uses two extra-low dispersion elements to provide high resolving power and minimal optical aberrations.

It features Pentax’s Supersonic Drive Motor system, which provides fast, silent, and accurate autofocus performance.

As one of Pentax’s DA*-series lenses, the 300mm f/4 has several key features that set it apart from many other lenses. Since it’s designed for crop-frame APS-C sized sensors, it offers a reduced physical size and weight. It features the DA*-series’ standard fully weather-sealed build, with Pentax’s SP-coating for a dust- and water-resistant front element.