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Viltrox AF 13mm f/1.4 STM — Prime/zoom
Viltrox

Viltrox AF 13mm f/1.4 STM

Prime/zoom

84
/ 100
From $449
VS
Canon RF 100-400mm f/5.6-8 — Prime/Zoom
Canon

Canon RF 100-400mm f/5.6-8

Prime/Zoom

84
/ 100
From $649
Specdex verdict

Dead heat — it comes down to priorities.

In our weighted Specdex score, Viltrox AF 13mm f/1.4 STM lands at 84 and Canon RF 100-400mm f/5.6-8 at 84. With scores tied, the decision hinges on which sub-scores matter most to you.

Pick Viltrox AF 13mm f/1.4 STM if…

  • ✓Proven optical formula
  • ✓Weather-sealing (L/GM/S)
  • ✓Strong resale

Pick Canon RF 100-400mm f/5.6-8 if…

  • ✓Fast aperture
  • ✓Quiet autofocus
  • ✓Weather-sealed (most)
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Winner by scenario

Derived from the sub-score breakdown · not a separate test

Build

Viltrox AF 13mm f/1.4 STM

Compared on the build sub-score

Viltrox AF 13mm f/1.4 STM leads on build (90 vs 88).

Sharpness

Tie

Compared on the sharpness sub-score

Effectively tied — neither pulls a 2-point weighted lead.

Autofocus

Canon RF 100-400mm f/5.6-8

Compared on the autofocus sub-score

Canon RF 100-400mm f/5.6-8 leads on af (82 vs 80).

Value for money

Viltrox AF 13mm f/1.4 STM

Specdex score per dollar at MSRP

Viltrox AF 13mm f/1.4 STM more score per dollar ($449 vs $649).

Viltrox AF 13mm f/1.4 STM 84
vs
84 Canon RF 100-400mm f/5.6-8

Score breakdown

Viltrox AF 13mm f/1.4 STM
84
sharpness 84
af 80
build 90
value 86
Canon RF 100-400mm f/5.6-8
84
sharpness 84
af 82
build 88
value 85

Specs side-by-side

Viltrox AF 13mm f/1.4 STM versus Canon RF 100-400mm f/5.6-8 — full spec comparison
Spec Viltrox AF 13mm f/1.4 STM Canon RF 100-400mm f/5.6-8

Viltrox AF 13mm f/1.4 STM

Pros
  • +Proven optical formula
  • +Weather-sealing (L/GM/S)
  • +Strong resale
Cons
  • −Mount-specific
  • −Older AF motor on some
  • −Heavier than modern counterparts

Canon RF 100-400mm f/5.6-8

Pros
  • +Fast aperture
  • +Quiet autofocus
  • +Weather-sealed (most)
Cons
  • −Mount-specific
  • −Weight varies
  • −Price scales with quality

FAQ: Viltrox AF 13mm f/1.4 STM vs Canon RF 100-400mm f/5.6-8

Which is better, Viltrox AF 13mm f/1.4 STM or Canon RF 100-400mm f/5.6-8? +

Both score 84 on our weighted rubric — tied. Your best pick depends on the sub-scores above.

Is Viltrox AF 13mm f/1.4 STM worth the price? +

At $449, Viltrox AF 13mm f/1.4 STM delivers a Specdex score of 84 — strongest in build.

Is Canon RF 100-400mm f/5.6-8 worth the price? +

At $649, Canon RF 100-400mm f/5.6-8 delivers a Specdex score of 84 — strongest in build.

Does Viltrox AF 13mm f/1.4 STM or Canon RF 100-400mm f/5.6-8 last longer? +

Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.

Which is better for build, Viltrox AF 13mm f/1.4 STM or Canon RF 100-400mm f/5.6-8? +

Viltrox AF 13mm f/1.4 STM — leads on build (90 vs 88). Compared on the build sub-score.

Which is better for autofocus, Viltrox AF 13mm f/1.4 STM or Canon RF 100-400mm f/5.6-8? +

Canon RF 100-400mm f/5.6-8 — leads on af (82 vs 80). Compared on the autofocus sub-score.