Overview

The Pentax smc FA 31mm F1.8 AL Limited is a well-built, all-metal lens with smooth handling and a permanent hood. Optically, it delivers good sharpness but shows some weaknesses in flare and ghosting. Its 31mm focal length is a versatile jack-of-all-trades. The lens is not weather-sealed and uses screw-drive AF, which is fast but noisy. It suits Pentax enthusiasts who value build quality and a unique focal length, though it is expensive and optically dated compared to modern alternatives.