Fujifilm XF400mm f/4.5 R LM OIS WR

Fujifilm XF400mm f/4.5 R LM OIS WR - a 609mm-equivalent view on APS-C

The Fujifilm XF400mm f/4.5 R LM OIS WR is a long-reach prime for Fujifilm X cameras, giving you a 400mm focal length in a fixed-lens design. On an APS-C body, that framing is equivalent to 609mm on a full-frame camera, bringing distant subjects prominently into the frame. The lens is aimed at wildlife and sports photographers, and bird photography is a natural fit too: small subjects can fill more of the image even when you need to keep your distance. For field sports, the narrow view helps isolate a player from the wider scene; for wildlife, the long reach supports close framing from a respectful distance. Its maximum aperture of f/4.5 is useful when light is fading or you want a softer background behind a subject, while the fixed focal length keeps the design focused on distant action rather than changing framing ranges. This isn’t a general-purpose zoom for varied scenes. It’s a specialist tool for Fujifilm X users who regularly photograph subjects that are far away and value a long, bright prime. The combination of reach, aperture and dedicated telephoto features is what sets it apart in the X-series lens range.

Why this focal length works

• Optical construction: The design uses 21 elements in 14 groups, including two Super ED and four ED elements. These special glass elements help control colour fringing around high-contrast edges, which can be noticeable with distant subjects.
• Optical stabilisation: Fujifilm rates the built-in stabilisation at up to 5.5 stops. That support is valuable when small camera movements are magnified by a tight telephoto view.
• Linear-motor autofocus: An internal focusing group is driven by a linear motor for fast, quiet autofocus. That suits moving subjects such as birds in flight or athletes changing direction.
• Focus preset: Save a focus position and return to it using the SET button. It’s a useful shortcut when a subject repeatedly appears at a known spot, such as a section of a track or a perch.
• Focus limiter: The limiter restricts focusing to subjects beyond five metres. This can keep the lens from searching through closer distances when your subject is farther away.
• Weather protection: Seals at 20 points guard against dust and moisture, and the lens is rated for use down to -10°C. The front element also has a fluorine coating that repels water and makes dirt less likely to cling.
• Rounded aperture blades: Nine blades shape the out-of-focus areas behind your subject. The aperture closes down to f/22 when you need more depth of field.
• Teleconverter support: The lens is compatible with Fujifilm’s XF1.4X TC WR and XF2X TC WR teleconverters. That gives X-system users the option of extending the reach with compatible accessories.

On your camera

This lens uses the Fuji X mount and is made for APS-C sensor cameras in Fujifilm’s X series. Its autofocus operates with compatible X bodies, so it can track subjects rather than relying on manual focusing. The stated 609mm full-frame equivalent describes the field of view on those APS-C cameras; it’s an equivalent framing figure, not a change to the lens’s actual focal length.

What's Included

• Fujifilm XF400mm f/4.5 R LM OIS WR lens
• Front lens cap (FLCP-95)
• Rear lens cap (RLCP-001)
• Lens hood
• Lens pouch
• Strap

Technical Specifications

• Brand: Fujifilm
• Model: XF400mm f/4.5 R LM OIS WR
• Type: Telephoto prime interchangeable lens
• Mount: Fuji X
• Sensor format: APS-C
• Focal length: 400mm
• Maximum aperture: f/4.5
• Minimum aperture: f/22
• Angle of view: 4°
• Autofocus: Yes, linear motor
• Optical stabilisation: Yes, up to 5.5 stops
• Filter size: 95mm
• Weight: Approximately 1,245g, excluding caps and hood