Compact Pentax macro prime with exceptional close-range sharpness, affordable 1:2 macro in the tiny M-series form factor.
The Pentax SMC Pentax-M 50mm f/4 Macro is a true macro lens for the Pentax K-mount system, achieving 1:2 (half life-size) magnification without accessories and reaching 1:1 with the optional extension tube. The compact M-series design makes it one of the most portable macro lenses available, keeping with the Pentax-M philosophy of miniaturisation.
Optically, the lens is optimised for close-range performance, delivering exceptional sharpness at macro distances where most standard lenses suffer from aberrations. The flat-field design ensures edge-to-edge sharpness on flat subjects like documents, stamps, and artwork — a critical requirement for true macro photography applications.
Build quality is excellent Pentax-M standard with an all-metal barrel, smooth focusing helicoid with extended travel for close focusing, and precise aperture click stops. The SMC coating provides excellent contrast and flare resistance essential for the high-contrast, close-range subjects that macro photography typically involves.
The SMC Pentax-M 50mm f/4 Macro offers exceptional macro capability at very affordable used prices. Its compact size, sharp optics, and Pentax K-mount compatibility make it an excellent choice for macro work on both vintage Pentax film bodies and modern Pentax DSLRs, where the smaller APS-C sensor provides additional effective magnification.