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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
Sony FE 50mm f/1.4 GM wins by 10
Sony FE 50mm f/1.4 GM — GM Series · Compact · Aperture ring
Sony

Sony FE 50mm f/1.4 GM

GM Series · Compact · Aperture ring

96
/ 100
From $1,298
Specdex verdict

Sony FE 50mm f/1.4 GM takes it — here’s why.

In our weighted Specdex score, Sigma 100-400mm DG DN OS lands at 86 and Sony FE 50mm f/1.4 GM at 96. That puts Sony FE 50mm f/1.4 GM ahead by 10 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 Sony FE 50mm f/1.4 GM if…

  • ✓Best 50mm AF lens for Sony E-mount
  • ✓Compact for f/1.4 GM glass
  • ✓Click-able aperture ring
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Winner by scenario

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

Build

Sony FE 50mm f/1.4 GM

Compared on the build sub-score

Sony FE 50mm f/1.4 GM leads on build (96 vs 90).

Sharpness

Sony FE 50mm f/1.4 GM

Compared on the sharpness sub-score

Sony FE 50mm f/1.4 GM leads on sharpness (98 vs 86).

Autofocus

Sony FE 50mm f/1.4 GM

Compared on the autofocus sub-score

Sony FE 50mm f/1.4 GM leads on af (98 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 $1,298).

Sigma 100-400mm DG DN OS 86
vs
96 Sony FE 50mm f/1.4 GM

Score breakdown

Sigma 100-400mm DG DN OS
86
sharpness 86
af 82
build 90
value 86
bokeh 0
Sony FE 50mm f/1.4 GM
96
sharpness 98
af 98
build 96
value 84
bokeh 96

Specs side-by-side

Sigma 100-400mm DG DN OS versus Sony FE 50mm f/1.4 GM — full spec comparison
Spec Sigma 100-400mm DG DN OS Sony FE 50mm f/1.4 GM
Mount
—
Sony E
Focal length
—
50 mm
Aperture
—
f/1.4 to f/16
Construction
—
14 elements / 11 groups
Min focus
—
0.41 m
Filter
—
67 mm
Weight
—
516 g

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

Sony FE 50mm f/1.4 GM

Pros
  • +Best 50mm AF lens for Sony E-mount
  • +Compact for f/1.4 GM glass
  • +Click-able aperture ring
Cons
  • −Premium pricing
  • −No image stabilization (relies on IBIS)
  • −No filter included

FAQ: Sigma 100-400mm DG DN OS vs Sony FE 50mm f/1.4 GM

Which is better, Sigma 100-400mm DG DN OS or Sony FE 50mm f/1.4 GM? +

Sony FE 50mm f/1.4 GM scores 96 on our weighted rubric — ahead by 10. 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 Sony FE 50mm f/1.4 GM worth the price? +

At $1,298, Sony FE 50mm f/1.4 GM delivers a Specdex score of 96 — strongest in sharpness.

Does Sigma 100-400mm DG DN OS or Sony FE 50mm f/1.4 GM 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 Sony FE 50mm f/1.4 GM? +

Sony FE 50mm f/1.4 GM — leads on build (96 vs 90). Compared on the build sub-score.

Which is better for sharpness, Sigma 100-400mm DG DN OS or Sony FE 50mm f/1.4 GM? +

Sony FE 50mm f/1.4 GM — leads on sharpness (98 vs 86). Compared on the sharpness sub-score.