Canon · Released Jun 2022 Last verified June 8, 2026

Canon RF 100-400mm f/5.6-8 Review

Name: Canon RF 100-400mm f/5.6-8
Brand: Canon

Prime/Zoom

Specdex verdict The Canon RF 100-400mm f/5.6-8 is a competent mid-range pick when the price is right — see our cheaper-and-better alternatives below for context.

Canon Canon RF 100-400mm f/5.6-8.

All Canon RF 100-400mm f/5.6-8 matchups → From $649

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Specdex verdict

Recommended

Specdex doesn't run benchmarks in-house. The verdict is an editorial assessment based on manufacturer specs and public reviewer consensus. See methodology.

Compare

Canon RF 100-400mm f/5.6-8 versus its closest rivals

All matchups →

Editorial · Specdex take

Pros

+Fast aperture
+Quiet autofocus
+Weather-sealed (most)

Cons

−Mount-specific
−Weight varies
−Price scales with quality

Who's the Canon RF 100-400mm f/5.6-8 for?

Quick verdicts for the most common buyer profiles, derived from the sub-scores above.

Power users and creators Skip

Compute scores trail current top-tier — look at our step-up alternatives below if performance is the priority.

Budget-conscious buyers Consider

Mid-tier pricing at $649 — review whether the score-per-dollar lines up against the cheaper alternatives we recommend.

In the box

What you get when you unbox the Canon RF 100-400mm f/5.6-8.

Lens
Front + rear caps
Lens hood (where applicable)
Soft pouch (premium tier)

Standard contents — region/SKU may vary; confirm at retailer.

Sources & benchmarks

Cited, not generated

Specdex does not run benchmarks in-house. We're rolling out cited public benchmark data category by category — PassMark for CPUs and GPUs is wired today; DXOMark, RTINGS, Geekbench, and NotebookCheck will follow.

Sources we use when available: PassMark for CPU/GPU, Geekbench Browser for synthetic, DXOMark for camera scores, RTINGS for TVs, monitors, and headphones. See methodology.