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Sigma 100-400mm DG DN OS — Prime/zoom
Sigma

Sigma 100-400mm DG DN OS

Prime/zoom

86
/ 100
From $999
VS
Canon EF 24-70mm f/2.8L II USM wins by 5
Canon EF 24-70mm f/2.8L II USM — Prime/zoom
Canon

Canon EF 24-70mm f/2.8L II USM

Prime/zoom

91
/ 100
From $1,899
Specdex verdict

Canon EF 24-70mm f/2.8L II USM takes it — here’s why.

In our weighted Specdex score, Sigma 100-400mm DG DN OS lands at 86 and Canon EF 24-70mm f/2.8L II USM at 91. That puts Canon EF 24-70mm f/2.8L II USM ahead by 5 points — a decisive margin driven mostly by its strengths in the categories below.

Pick Sigma 100-400mm DG DN OS if…

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

Pick Canon EF 24-70mm f/2.8L II USM if…

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

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

Build

Tie

Compared on the build sub-score

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

Sharpness

Canon EF 24-70mm f/2.8L II USM

Compared on the sharpness sub-score

Canon EF 24-70mm f/2.8L II USM leads on sharpness (91 vs 86).

Autofocus

Canon EF 24-70mm f/2.8L II USM

Compared on the autofocus sub-score

Canon EF 24-70mm f/2.8L II USM leads on af (87 vs 82).

Value for money

Sigma 100-400mm DG DN OS

Specdex score per dollar at MSRP

Sigma 100-400mm DG DN OS more score per dollar ($999 vs $1,899).

Sigma 100-400mm DG DN OS 86
vs
91 Canon EF 24-70mm f/2.8L II USM

Score breakdown

Sigma 100-400mm DG DN OS
86
sharpness 86
af 82
build 90
value 86
Canon EF 24-70mm f/2.8L II USM
91
sharpness 91
af 87
build 90
value 86

Specs side-by-side

Sigma 100-400mm DG DN OS versus Canon EF 24-70mm f/2.8L II USM — full spec comparison
Spec Sigma 100-400mm DG DN OS Canon EF 24-70mm f/2.8L II USM

Sigma 100-400mm DG DN OS

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

Canon EF 24-70mm f/2.8L II USM

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

FAQ: Sigma 100-400mm DG DN OS vs Canon EF 24-70mm f/2.8L II USM

Which is better, Sigma 100-400mm DG DN OS or Canon EF 24-70mm f/2.8L II USM? +

Canon EF 24-70mm f/2.8L II USM scores 91 on our weighted rubric — ahead by 5. Your best pick depends on the sub-scores above.

Is Sigma 100-400mm DG DN OS worth the price? +

At $999, Sigma 100-400mm DG DN OS delivers a Specdex score of 86 — strongest in build.

Is Canon EF 24-70mm f/2.8L II USM worth the price? +

At $1,899, Canon EF 24-70mm f/2.8L II USM delivers a Specdex score of 91 — strongest in sharpness.

Does Sigma 100-400mm DG DN OS or Canon EF 24-70mm f/2.8L II USM 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 sharpness, Sigma 100-400mm DG DN OS or Canon EF 24-70mm f/2.8L II USM? +

Canon EF 24-70mm f/2.8L II USM — leads on sharpness (91 vs 86). Compared on the sharpness sub-score.

Which is better for autofocus, Sigma 100-400mm DG DN OS or Canon EF 24-70mm f/2.8L II USM? +

Canon EF 24-70mm f/2.8L II USM — leads on af (87 vs 82). Compared on the autofocus sub-score.