Overview

The Ricoh Rikenon P zoom 28-100 mm f/4 Macro is a versatile all-in-one lens for Pentax K-mount, offering a useful macro capability at the long end. Optically, it delivers good sharpness in the center but softens at the edges, especially at wider apertures (OpticalLimits). Chromatic aberration and distortion are present but manageable. Build quality is solid with a metal mount and smooth zoom/focus rings, though the lens is somewhat heavy. It suits Pentax shooters seeking a single-lens solution for travel or general photography, particularly those who value macro functionality.