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Fujifilm XF 400mm f/4.5 Lens Review: Top-Tier Super Telephoto for X-Mount

other · 2026-09-04

Fujifilm has introduced the XF 400mm f/4.5 R LM OIS WR, a super telephoto prime lens designed for the X-mount APS-C system, with a retail price of $3,199. This lens provides a focal length equivalent to about 609mm in full-frame terms, which can be increased to 840mm using a 1.4x teleconverter. Weighing in at 44 ounces (1245 grams), it boasts a weather-sealed body, a 95mm filter thread, customizable AF-lock buttons, a manual focus ring, and a detachable tripod foot. While testing with the Fujifilm X-H2S revealed impressive optical quality, some autofocus challenges were noted. Alternatives include the Fujifilm XF 500mm f/5.6 and zoom lenses like the XF 100-400mm and 150-600mm, making the XF 400mm a strong choice for X-mount enthusiasts seeking top-tier performance.

Key facts

  • Fujifilm released the XF 400mm f/4.5 R LM OIS WR lens for X-mount cameras.
  • The lens is priced at $3,199.
  • It weighs 44 ounces (1245 grams) and has a 95mm filter thread.
  • The lens provides a full-frame equivalent focal length of about 609mm, extendable to 840mm with 1.4x teleconverter.
  • It features a rugged, weather-sealed design with customizable AF-lock buttons and a removable tripod foot with Arca-Swiss dovetails.
  • The lens was tested with the Fujifilm X-H2S body, showing excellent sharpness and bokeh but some autofocus inconsistencies.
  • The reviewer found the autofocus issues to be with the camera body, not the lens.
  • Alternatives include the Fujifilm XF 500mm f/5.6 and zoom lenses like XF 100-400mm and 150-600mm.

Entities

Institutions

  • Fujifilm

Sources