Lens Lab
Pentax SMC
205–210mm · f/3.5
Overview
The SMC Pentax-M 50mm f/1.7 is a solid, affordable lens with consistent optical quality across copies, according to 50mmf2.com. Build is all-metal with smooth focus and positive aperture clicks, though the focus ring grip may loosen. The SMC-A 35mm f/2.8 shares the same optics as the M version but offers auto-aperture compatibility and slightly better build, per casualphotophile.com. Both suit Pentax K-mount users seeking compact, well-made manual lenses at low cost, with the A version preferred for auto-exposure bodies.