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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
Fujifilm XF 56mm f/1.2 R wins by 5
Fujifilm XF 56mm f/1.2 R — Prime/Zoom
Fujifilm

Fujifilm XF 56mm f/1.2 R

Prime/Zoom

91
/ 100
From $1,499
Specdex verdict

Fujifilm XF 56mm f/1.2 R takes it — here’s why.

In our weighted Specdex score, Sigma 100-400mm DG DN OS lands at 86 and Fujifilm XF 56mm f/1.2 R at 91. That puts Fujifilm XF 56mm f/1.2 R 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 Fujifilm XF 56mm f/1.2 R 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

Sigma 100-400mm DG DN OS

Compared on the build sub-score

Sigma 100-400mm DG DN OS leads on build (90 vs 88).

Sharpness

Fujifilm XF 56mm f/1.2 R

Compared on the sharpness sub-score

Fujifilm XF 56mm f/1.2 R leads on sharpness (91 vs 86).

Autofocus

Fujifilm XF 56mm f/1.2 R

Compared on the autofocus sub-score

Fujifilm XF 56mm f/1.2 R leads on af (89 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 $1,499).

Sigma 100-400mm DG DN OS 86
vs
91 Fujifilm XF 56mm f/1.2 R

Score breakdown

Sigma 100-400mm DG DN OS
86
sharpness 86
af 82
build 90
value 86
Fujifilm XF 56mm f/1.2 R
91
sharpness 91
af 89
build 88
value 85

Specs side-by-side

Sigma 100-400mm DG DN OS versus Fujifilm XF 56mm f/1.2 R — full spec comparison
Spec Sigma 100-400mm DG DN OS Fujifilm XF 56mm f/1.2 R

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

Fujifilm XF 56mm f/1.2 R

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

FAQ: Sigma 100-400mm DG DN OS vs Fujifilm XF 56mm f/1.2 R

Which is better, Sigma 100-400mm DG DN OS or Fujifilm XF 56mm f/1.2 R? +

Fujifilm XF 56mm f/1.2 R 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 Fujifilm XF 56mm f/1.2 R worth the price? +

At $1,499, Fujifilm XF 56mm f/1.2 R delivers a Specdex score of 91 — strongest in sharpness.

Does Sigma 100-400mm DG DN OS or Fujifilm XF 56mm f/1.2 R 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, Sigma 100-400mm DG DN OS or Fujifilm XF 56mm f/1.2 R? +

Sigma 100-400mm DG DN OS — leads on build (90 vs 88). Compared on the build sub-score.

Which is better for sharpness, Sigma 100-400mm DG DN OS or Fujifilm XF 56mm f/1.2 R? +

Fujifilm XF 56mm f/1.2 R — leads on sharpness (91 vs 86). Compared on the sharpness sub-score.