Pentax 100-300mm F/4.7-5.8 SMC FA Silver K Mount Autofocus Lens Review

The Pentax 100-300mm F/4.7-5.8 SMC FA is a budget telephoto zoom for Pentax K-mount DSLRs, offering a useful focal range for wildlife, sports, and portraits at an entry-level price. This used lens is available in excellent condition, making it an affordable option for photographers looking to extend their reach without a significant investment. The SMC (Super Multi-Coated) designation indicates multi-layer coatings to reduce flare and ghosting.

As a variable aperture zoom, the lens starts at f/4.7 at 100mm and stops down to f/5.8 at 300mm, which is typical for budget telephoto zooms but may limit performance in lower light. The 58mm filter thread is a common size, and the silver finish matches older Pentax film bodies and some digital models. At this price point, it provides a practical entry into telephoto photography for Pentax shooters, though those requiring faster apertures or more modern features may need to look elsewhere.