Fujifilm has officially announced the Fujinon XF 400mm f/4.5 R LM OIS WR, a weather-sealed super-telephoto prime lens offering a 609mm full-frame equivalent focal length and 5.5 stops of optical image stabilization for $3,199.95, scheduled for release in mid-September 2026.
Fujifilm is expanding its high-reach lineup with a portable optic designed specifically for wildlife, birding, and motorsports photography. Announced on September 4, 2026, the Fujinon XF 400mm f/4.5 R LM OIS WR arrives alongside hands-on demonstrations with birds of prey and targets a gap in the market for a lightweight, handheld super-telephoto prime lens that does not require a monopod or heavy tripod to manage over a long day in the field.
Optical Engineering and Design Choices
The lens features an optical construction of 21 elements arranged in 14 groups. This formula incorporates two Super ED elements and four extra-low dispersion (ED) elements to effectively minimize chromatic aberration and contribute to what Fujifilm calls exceptional resolution. It operates with a nine-bladed rounded aperture diaphragm spanning f/4.5 to f/22.
While an aperture of f/4.5 may not sound as bright as exotic prime lenses, the 400mm focal length naturally narrows the angle of view and magnifies background elements. According to hands-on testing, this optical property makes distant backgrounds melt away into a soft bokeh even at the moderate f/4.5 setting.
Weight Distribution and Field Handling
Super-telephoto lenses have historically caused physical fatigue during extended shooting sessions. Fujifilm designed this optic to counteract front-heaviness by positioning its center of gravity closer to the middle of the barrel. Weighing 1,245 grams (about 2.74 pounds) on its own, the lens balances comfortably when paired with camera bodies like the Fujifilm X-H2S, bringing the total kit weight to 4.19 pounds.
“When you’re making images outdoors, reach matters. You need a lens that gets you close to the action without disturbing the scene or wearing you down over a long day. XF400mm lets photographers stay mobile and react to what’s in front of them, and they don’t have to trade image quality to do it. With super telephoto lenses, the balance of size and performance is the creative advantage, and XF400mm is exactly that. Lightweight, compact, powerful.”
Victor Ha, vice president and general manager, Electronic Imaging Division, Fujifilm North America Corporation
In field comparisons, the weight profile proves competitive against alternative systems. For instance, an equivalent setup using the OM System OM-1 Mark II paired with the M.Zuiko Digital ED 150-600mm F5.0-6.3 IS weighs 4.55 pounds without a camera body, placing the Fujifilm option slightly lighter for mobile shooters.
Advanced Telephoto Controls and Weather Sealing
Autofocus is driven by a high-speed linear motor designed to deliver fast, accurate, and nearly silent tracking. To assist photographers tracking erratic subjects, the lens includes a focus limiter function alongside a specialized focus preset system. By flipping a barrel switch to preset, pointing at a measured distance, and pressing the set button near the front element, users can memorize a specific focus position and recall it instantly via control buttons on the lens body.
The barrel is sealed at 20 points to provide dust and weather resistance, rated to function in temperatures as low as 14°F / -10°C. Field testers confirmed that the weather-proofing handles pouring rain without failure. Additionally, the built-in optical image stabilization system provides up to 5.5 stops of shake compensation.
Pricing and Market Positioning
The Fujinon XF 400mm f/4.5 R LM OIS WR carries a retail price of $3,199.95 in the United States and £2,499 in the United Kingdom, with mid-September availability. It joins an existing trio of long-reach options that cover full-frame equivalent ranges from 305mm to approximately 762mm, and it remains fully compatible with Fujifilm’s 1.4x and 2x teleconverters, which push the maximum equivalent reach to 853mm and 1,219mm respectively.
When set against competing native options for full-frame systems, the pricing occupies a middle tier. While specialty professional glass like the Canon RF 400mm F2.8L IS USM commands a price tag of $14,000, alternative mirrorless super-telephoto primes such as the Nikon NIKKOR Z 400mm f/4.5 VR S retail closer to comparable market figures.
