Overview

The Pentax FA 28-105mm F3.5-5.6 is a compact, weather-sealed standard zoom for full-frame Pentax cameras, offering good image quality with sharpness across the range, especially at f/8-11. Optical strengths include effective coatings and a nine-blade diaphragm for smooth bokeh. Weaknesses are the variable aperture and a continuous-spinning manual focus ring. Build quality is high with excellent rubber grips and smooth zoom/focus rings. It suits walkabout, landscape, portrait, and night photographers seeking a versatile, affordable kit lens alternative.