Fujifilm · Fujifilm X mount · Updated 31 Aug 2026
XF 100-400mm F4.5-5.6 R LM OIS WR
A proven wildlife zoom with strong sharpness across the range, effective OIS, teleconverter support, and professional bulk.
Diffraction-adjusted maker MTF with a conservative evidence penalty.
01 / EDITORIAL TAKE
What the evidence supports
A proven wildlife zoom with strong sharpness across the range, effective OIS, teleconverter support, and professional bulk.
- Best for
- Wildlife, Sports.
- Main tradeoff
- Its 1375g weight, F4.5–5.6 maximum aperture, and quantified maker mtf evidence profile should be considered against the alternatives below.
02 / VERIFIED SPECIFICATIONS
The decision-grade facts
- 35mm equivalent
- 152–609mm
- Maximum aperture
- F4.5–5.6
- Focus
- AF
- Weight
- 1375g
- Dimensions
- Ø94.8 × 210.5–270mm
- Weather resistance
- Yes
- Optical stabilization
- Yes
- US list price
- $1,899
MSRP is a static US list-price reference, not a live offer. Verified 2026-08-30. Price source ↗
03 / EVIDENCE
What the rank rests on
Official curves were digitized and diffraction-adjusted; the wider interval reflects missing independent confirmation.
- Maker MTF Index
- 69.8
- Zoom endpoint range
- 67.1–73.8
04 / ALTERNATIVES
Compare before deciding
A sharp central telezoom with excellent value and lighter mass than pro wildlife glass; full-frame origins and aperture limit portability gains.
Resolution 78.0 ±12FujifilmXF 70-300mm F4-5.6 R LM OIS WRCompact, fast, and officially qualified; independent testing finds the 300mm edges less convincing on the densest sensor.
Resolution 88.0 ±3FujifilmXF 90mm F2 R LM WRArguably the cleanest long prime in the system: exceptional acuity, fast quad-linear AF, and controlled aberrations.
Resolution 95.1 ±3