FGI / 40

Fujifilm · Fujifilm X mount · Updated 31 Aug 2026

XF 70-300mm F4-5.6 R LM OIS WR

Compact, fast, and officially qualified; independent testing finds the 300mm edges less convincing on the densest sensor.

107–457mm equivalentF4–5.6Zoom · AFWeather resistantOIS
Fujifilm XF 70-300mm F4-5.6 R LM OIS WR
Resolution Index88.0±3
Catalog position#34strong
Evidence basisMTF index + lab0 corroborating sources

55% diffraction-adjusted maker MTF · 45% compatible lab/technical prior.

01 / EDITORIAL TAKE

What the evidence supports

Compact, fast, and officially qualified; independent testing finds the 300mm edges less convincing on the densest sensor.

Best for
Wildlife, Travel.
Main tradeoff
Its 580g weight, F4–5.6 maximum aperture, and mtf index + lab evidence profile should be considered against the alternatives below.

02 / VERIFIED SPECIFICATIONS

The decision-grade facts

35mm equivalent
107–457mm
Maximum aperture
F4–5.6
Focus
AF
Weight
580g
Dimensions
Ø75 × 132.5–205.5mm
Weather resistance
Yes
Optical stabilization
Yes
US list price
$949

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

Curve index is checked against 1 controlled lab source.

Maker MTF Index
68.6
Zoom endpoint range
65.5–73.3

04 / ALTERNATIVES

Compare before deciding