

The XF 400 f/4.5 R LM OIS WR is a Fuji X-mount lens for APS-C X-mount cameras (providing the equivalent of a 609mm lens) and is Fuji’s second-longest prime to date. Key features include:
5.5 stops of optical image stabilization
Weather resistant
Weighs under 3 pounds
Linear AF motor
Superlight Supertele. Fuji set out to expand on the fixed XF-series lenses with a lighter design with a smaller front diameter, all while producing superior image quality. During this process, they found that by replacing a small number of metal parts with resin-built alternatives and moving all parts and elements to the middle and rear of the lens, their mission was accomplished. This one expedition became the XF 400 f/4.5 R LM OIS WR lens, which weighs in at under 3 pounds and is under 10-inches at its longest extension! It features extensive weather sealing and is compatible with optional 1.4x and 2x teleconverters to boost your reach to 560mm and 800mm.
High-Performance Features. It’s not enough to be able to reach wildlife and action subjects but you must also be quick about it. This lens offers a very quiet linear motor that can achieve focus in as little as 0.33 seconds (when using Phase Detection AF and High Performance Mode on your Fuji camera). You’re further assisted by the advanced image stabilization system, which provides up to 5.5 stops of shake correction. Vertical stabilization in particular has gotten a big upgrade in this lens.
Recommended Cameras. The XF 400 f/4.5 R LM OIS WR will pair with any X-mount, APS-C camera – even very high megapixel models. It is particularly well-suited for really fast cameras, like the Fuji X-H2S, which can do up to 40 fps. However, many Fuji bodies today can shoot north of 10 fps, which is enough for practiced photographers to capture most subjects. You may also want to take advantage of something with built-in image stabilization and weather sealing to match this lens. Examples include the sleek Fuji X-S20 and the 40MP, 6.2K Fuji X-T5.
Certainly! It’s possible you may have to update the firmware of your camera depending on the model but this lens pairs great with any X-mount Fuji camera.
No. The GFX line consists of medium format cameras with a different mount, Fuji G-mount. This lens is only for X-mount cameras and designed specifically for crop sensors.
The XF 400mm is designed to be a very hand-holdable lens but it’s still a supertelephoto and a tripod is always recommended for maximum quality. For ideas, check out the carbon fiber MeFoto Globetrotter or the pan-and-tilt headed Manfrotto 290 Xtra.
| Angle of View |
4.1º |
| Aperture Blades |
9, rounded |
| Brand |
Fuji |
| Dimensions |
4.1 × 9.4″ (ø x L) |
| Filter Size |
95.0mm |
| Filter Type |
Screw-On |
| Focal Length |
400-400 |
| Focus Type |
Autofocus |
| Groups/Elements |
14/21 |
| Item Type |
Lens |
| Lens Format |
APS-C |
| Lens Mount |
Fuji X |
| Lens Type |
Supertelephoto and For Mirrorless |
| Maximum Aperture |
4.5 |
| Maximum Magnification |
0.16x |
| Mfr. Model Number |
16981452 |
| Minimum Focusing Distance |
9’ |
| Stabilization |
Yes |
| Weather Sealing |
Yes |
| Weight |
2.74 lb. |
| Zoom Type |
Fixed Focal Length |