Overview

The Pentax-110 24mm f/2.8 is a tiny, lightweight lens originally for the Pentax Auto 110 system, now popular for adaptation to Micro Four Thirds and Fujifilm X cameras. It must be used wide open as it lacks an aperture diaphragm. Optical performance is surprisingly good but not sharp by modern standards; it can produce soft, glow-y results, especially with fingerprints. Build is simple and inexpensive, often costing £5-15. It suits photographers seeking a fun, experimental lens for compact systems, not everyday sharpness.