Does the Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR take a teleconverter?
2 teleconverters are supported. A teleconverter multiplies the focal length and costs you light — and on a crop body the framing multiplies again.
Both converters are supported and both stay usable: 140-560mm at f/6.3-8 with the 1.4x, 200-800mm at f/9-11 with the 2x. On a lens this fast the 2x is the unusual case of a 2x that does not cost you autofocus.
| Teleconverter | Supported | Reach | Max aperture | On APS-C | On Micro Four Thirds |
|---|---|---|---|---|---|
| Fujifilm XF1.4X TC WR | Yes — Requires lens firmware Ver.1.00 or later. No functional restriction stated. Becomes 140-560mm f/6.4-8. | 140-560mm | f/6.3-8 | 210-840mm | — |
| Fujifilm XF2X TC WR | Yes — Requires lens firmware Ver.1.10 or later, with Fujifilm's footnote: "Update the camera body first before updating the lens firmware." Becomes 200-800mm f/9-11. AUDIT-VERIFIED verbatim 2026-08-29. | 200-800mm | f/9-11 | 300-1200mm | — |
What each converter gives you
Fujifilm XF1.4X TC WR — 140-560mm at f/6.3-8 on this lens, autofocus retained.
Fujifilm XF2X TC WR — 200-800mm at f/9-11 on this lens, autofocus retained.
The lens itself: Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR · every Fujifilm X lens: Fujifilm X lens index · all teleconverter compatibility
Compatibility sourced from the manufacturers' own published teleconverter compatibility statements (manufacturer teleconverter compatibility statements (Sony, Canon USA, Nikon, Fujifilm, Sigma, Panasonic, OM System) — each row carries its own source URL) and verified 2026-09-02. Reach and aperture figures are computed from the lens's own published focal length and maximum aperture — a 1.4x multiplies focal length by 1.4 and costs 1 stop; a 2x multiplies by 2 and costs 2 stops. Lenses whose compatibility we could not verify from a manufacturer statement are omitted rather than guessed. Methodology