Specifications#
- Brand
- Fujifilm
- Model
- GF23mmF4 R LM WR
- Lens type
- Ultra-wide prime
- Focal length
- 23 mm
- Maximum aperture
- f/4
- Image circle
- Medium format (43.8×32.9 mm)
- Mount(s)
- Fujifilm G-mount
- Projection
- Rectilinear
- Autofocus motor
- linear motor (LM)
- Lensfun correction profile
- Yes — distortion/vignetting/TCA
Equivalent focal length on different cameras#
Field of view and depth-of-field equivalence when this lens is used on bodies with different sensor sizes (natively or via an adapter).
| Camera format | At 23 mm | Equiv. aperture (DoF) |
|---|---|---|
| Full frame | 23 mm · 86° | f/4.0 |
| APS-C | 34 mm · 63° | f/6.0 |
| APS-C (Canon) | 37 mm · 60° | f/6.4 |
| Micro Four Thirds | 46 mm · 50° | f/8.0 |
| Medium format 44×33 | 18 mm · 100° | f/3.2 |
Depth of field & background blur#
Computed on its native Medium format format (CoC 38 µm). “Blur @2 m” is the size of an out-of-focus point at infinity, as a percentage of frame width, with the subject at 2 m — a simple bokeh index.
| Focal | Aperture | at 1 m | at 2 m | at 5 m | at 10 m | Hyperfocal | Blur @2 m |
|---|---|---|---|---|---|---|---|
| 23 mm | f/4 | 60.9 cm | 3.35 m | ∞ | ∞ | 3.50 m | 0.2% |
| 23 mm | f/8 | 1.64 m | ∞ | ∞ | ∞ | 1.76 m | 0.1% |
Handheld & night-sky limits#
NPF assumes typical 20–24 MP sensors (≈6 µm pixels on full frame, ≈3.9 µm on APS-C, ≈3.3 µm on Micro Four Thirds).
| Body | Min. handheld shutter (longest focal) | 500 rule at 23 mm | NPF at 23 mm, f/4 |
|---|---|---|---|
| Full frame | 1/25 s | 22 s | 14 s |
| APS-C | 1/30 s | 14 s | 11 s |
| APS-C (Canon) | 1/40 s | 14 s | 11 s |
| Micro Four Thirds | 1/50 s | 11 s | 10 s |
Compatible cameras#
Bodies in our database with a native Fujifilm G-mount mount.
- Fujifilm GFX100S II 2024
- Fujifilm GFX100 II 2023
- Fujifilm GFX100S 2021
- Fujifilm GFX50S II 2021
- Fujifilm GFX100 2019
- Fujifilm GFX 50R 2018
- Fujifilm GFX 50S 2017
- Kyocera Contax G
Frequently asked questions#
Is the Fujifilm GF23mmF4 R LM WR full frame?
No — it is designed for Medium format sensors.
What is the Fujifilm GF23mmF4 R LM WR equivalent to on APS-C?
Its focal length is already the real value for Medium format: 23 mm frames like 18 mm on full frame.
What is the Fujifilm GF23mmF4 R LM WR good for?
As a ultra-wide prime it suits astrophotography, landscapes and dramatic perspectives.
Sources & licences#
- Lensfun lens database — CC BY-SA 3.0
Last updated October 03, 2026 · How we calculate · Sources