According to reviewer Drew Hopper, Fujifilm’s new FUJINON XF400mmF4.5 R LM OIS WR lens combines a 400mm focal length with a lightweight 1,245g design, offering a 609mm full-frame equivalent when mounted on an APS-C X Series camera like the X-H2S for mobile wildlife and sports photography.
FUJINON XF400mmF4.5 R LM OIS WR Specifications and Optics
The lens features a maximum aperture of f/4.5 and an optical construction comprising 21 elements in 14 groups, including two Super ED and four ED elements designed to minimize chromatic aberration, according to Hopper’s field report. For extended reach, the lens is compatible with Fujifilm teleconverters. The XF1.4X TC WR extends the focal length to 560mm (853mm full-frame equivalent), while the XF2X TC WR pushes it to 800mm (1,219mm full-frame equivalent).
According to product specifications, the optical system incorporates 5.5 stops of optical image stabilisation to counteract movement at long focal lengths during handheld shooting. Autofocus is managed by an internal focusing system driven by a high-speed linear motor. The lens barrel includes physical controls such as a Focus Control Button, Focus Select Switch, Focus Preset Button, and a Focus Distance Range Selector to adjust focusing speed and limiters for subjects past five metres.
Build Quality and Field Performance
Weighing approximately 1,245g, the XF400mmF4.5 features a balance point where the centre of gravity is positioned closer to the camera body to reduce front-heavy strain during extended use. Hopper noted that carrying the lens for a full day of outdoor bird watching across difficult terrain proved manageable without causing physical fatigue.
The lens barrel is weather-sealed at 20 points for dust and moisture resistance, rated for operations down to -10°C, and features a fluorine coating on the front element to repel water and smudges.
Image Quality and Practical Handling
Testing with the Fujifilm X-H2S showed that the 609mm-equivalent field of view extracts fine detail from distant subjects, preserving textures in feathers, fur, and branches. The f/4.5 aperture creates background separation, isolating subjects from cluttered environments. Hopper observed that the combination of rapid autofocus, 5.5-stop image stabilisation, and lighter weight provides stability when shooting dynamic wildlife scenes.
Pricing and Availability
According to official product details, the FUJINON XF400mmF4.5 R LM OIS WR is priced at $4,949 AUD, positioning it as a premium option for professional photographers requiring long-range reach without traditional bulk.
Frequently Asked Questions
What is the full-frame equivalent focal length of the FUJINON XF400mmF4.5?
When mounted on Fujifilm APS-C X Series cameras, it delivers a 35mm-equivalent focal length of 609mm.
Does the lens support teleconverters?
Yes, it is compatible with the XF1.4X TC WR (extending to 560mm / 853mm equivalent) and the XF2X TC WR (extending to 800mm / 1,219mm equivalent).
How much does the XF400mmF4.5 weigh?
The lens weighs approximately 1,245g.
What weather-sealing features are included?
The barrel is sealed at 20 points for dust and moisture resistance, is rated down to -10°C, and features a fluorine coating on the front element.
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