Fujifilm has officially expanded its medium format GFX lens lineup with the introduction of the Fujinon GF23mm f/4 R LM WR, an ultra wide-angle prime designed for photographers who require high optical precision and rugged performance in the field. With a retail price of £2399, this new addition promises to be an enticing option for landscape, architectural and interior photographers seeking edge-to-edge clarity and distortion control on the GFX platform.
Offering an equivalent focal length of 18mm in 35mm terms, the GF23mm f/4 provides a sweeping 99.9-degree angle of view, making it the widest prime lens currently available in the GF mount lineup. The expansive field of view caters directly to those capturing grand vistas or intricate interior spaces, where the breadth of the frame and line accuracy are crucial.
The optical design features a complex arrangement of 15 elements in 12 groups. These include two aspherical elements, one Super ED (Extra-low Dispersion) element, and three ED elements, all aimed at minimising chromatic aberration and distortion. This advanced optical formula ensures superior image quality across the frame, even when shooting wide open at f/4.
To further enhance image clarity, Fuji has applied its proprietary Nano GI (Gradient Index) coating. This coating is engineered to suppress ghosting and flare caused by light entering the lens from diagonal angles—a common challenge with ultra wide-angle lenses. By reducing internal reflections, the Nano GI coating contributes to improved contrast and colour fidelity, particularly in challenging lighting scenarios.
The GF23mm f/4 features an internal focusing system driven by a linear motor, delivering fast, quiet, and accurate autofocus performance. Fuji highlights the fact that this design also helps reduce the overall weight of the lens by minimising the mass of the moving elements. The lens has a minimum focusing distance of 38cm, giving photographers additional flexibility when shooting in tighter spaces or when working with foreground elements to create dynamic compositions.
Durability is another key selling point of the lens. The Fujinon GF23mm f/4 has been weather-sealed in nine distinct areas, providing resistance against dust, moisture, and low temperatures. This makes it well-suited to outdoor photography in challenging environments, from coastal scenes to mountain ranges. The build quality is solid, with an 82mm filter thread and a body weighing approximately 845g—not overly burdensome for a medium format setup.
In terms of control, the lens features a 9-blade rounded diaphragm for pleasing bokeh rendering, though given its focal length, shallow depth-of-field effects are not the primary focus. The aperture ring offers 1/3 EV stops across 19 steps, giving photographers fine-tuned exposure control in manual mode.
As the GFX system continues to gain popularity among professionals and advanced enthusiasts, Fuji’s commitment to expanding its lens range is evident. The GF23mm f/4 slots in as a critical tool for those who demand ultra wide perspectives without compromising on image quality or weather resistance.
Specifications:
Lens construction: 15 elements in 12 groups (2 aspherical, 1 Super ED, 3 ED)
Focal length (35mm equivalent): 23mm (18mm)
Angle of view: 99.9°
Maximum aperture: f/4
Minimum aperture: f/32
Aperture blades: 9 (rounded diaphragm)
Aperture steps: 1/3EV (19 steps)
Focus range: 38cm to infinity
Maximum magnification: 0.09x
Dimensions (Diameter x Length): 89.8mm x 103.0mm
Weight: 845g (excluding caps and hood)
Filter size: 82mm
Included accessories: Lens cap FLCP-82, rear cap RLCP-002, lens hood, lens pouch
Price and Availability:
The Fujinon GF23mm f/4 R LM WR is available now with a retail price of £2399 in the UK and approximately $2699 in the US. For more information or to purchase, visit the official Fujifilm product page at fujifilm-x.com.