The Fuji GF23mm f/4 construction comprises 12 groups in 15 elements using two aspherical lenses, one super ED lens and three ED lenses.
Fuji says the GF23mm lens’s inner focusing AF system reduces the weight of the medium-format optic, while a linear motor used to drive the lens elements promises quieter AF.
Fuji has applied a Nano GI coating to limit incident light entering the lens from diagonal angles due to the nature of its ultra wide angles.
The Fujinon GF23mm f/4 has also been weather-sealed in nine areas, making it dust- and water-resistant.
Fujinon GF23mm f/4 Specifications
15 elements 12 groups
(includes 2 aspherical ,1 Super ED , 3ED elements）
Focal length (35mm format equivalent)
Angle of view
Number of blades: 9（rounded diaphragm opening）
Stop size: 1/3EV (19 steps)
External dimensions: Diameter x Length (approx.)
（distance from camera lens mount flange）
Φ89.8mm x 103.0mm
(excluding caps, hoods ）
Lens cap FLCP-82
Lens rear cap RLCP-002