FUJIFILM Fujinon GF 23mm f/4 R LM WR Autofocus Lens for G-Mount, Black Review

The Fujifilm Fujinon GF 23mm f/4 R LM WR is an ultra-wide prime lens designed for Fujifilm's medium-format GFX system. With an effective focal length of roughly 18mm in full-frame terms, it delivers expansive field of view ideal for landscape, architecture, and interior work. The lens features weather-resistant construction, a linear autofocus motor, and an 82mm filter thread, making it a practical choice for demanding field conditions.

At f/4, it's not the fastest ultra-wide available, but it strikes a balance between size, weight, and optical performance typical of Fujifilm's GF lineup. The weather sealing and solid build quality align with the professional durability expected from medium-format glass. For GFX shooters who need a compact, reliable ultra-wide with minimal distortion and excellent resolving power across the frame, the GF 23mm f/4 slots neatly into the system without the bulk or cost of faster alternatives.