Tamron

Tamron 50-400mm f/4.5-6.3 Di III VC VXD

Name: Tamron 50-400mm f/4.5-6.3 Di III VC VXD
Brand: Tamron
SKU: tamron-50-400mm-f-4-5-6-3-di-iii-vc-vxd

Prime/zoom

/ 100

From $1,299

Sigma 24-70mm f/2.8 DG DN II Art wins by 6

Sigma

Sigma 24-70mm f/2.8 DG DN II Art

L/E mount · Constant f/2.8 · 745g

/ 100

From $1,099

Specdex verdict

Sigma 24-70mm f/2.8 DG DN II Art takes it — here’s why.

In our weighted Specdex score, Tamron 50-400mm f/4.5-6.3 Di III VC VXD lands at 87 and Sigma 24-70mm f/2.8 DG DN II Art at 93. That puts Sigma 24-70mm f/2.8 DG DN II Art ahead by 6 points — a decisive margin driven mostly by its strengths in the categories below.

Pick Tamron 50-400mm f/4.5-6.3 Di III VC VXD if…

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

Pick Sigma 24-70mm f/2.8 DG DN II Art if…

✓Sharper than first-party Sony GM at 1/3 the price
✓Aperture ring with click toggle
✓Weather-sealed

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Winner by scenario

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

Sharpness

Sigma 24-70mm f/2.8 DG DN II Art

Compared on the sharpness sub-score

Sigma 24-70mm f/2.8 DG DN II Art leads on sharpness (95 vs 87).

Build

Sigma 24-70mm f/2.8 DG DN II Art

Compared on the build sub-score

Sigma 24-70mm f/2.8 DG DN II Art leads on build (92 vs 90).

Autofocus

Sigma 24-70mm f/2.8 DG DN II Art

Compared on the autofocus sub-score

Sigma 24-70mm f/2.8 DG DN II Art leads on af (92 vs 83).

Value for money

Sigma 24-70mm f/2.8 DG DN II Art

Specdex score per dollar at MSRP

Sigma 24-70mm f/2.8 DG DN II Art more score per dollar ($1,099 vs $1,299).

Tamron 50-400mm f/4.5-6.3 Di III VC VXD 87

93 Sigma 24-70mm f/2.8 DG DN II Art

Score breakdown

Tamron 50-400mm f/4.5-6.3 Di III VC VXD

sharpness 87

af 83

build 90

value 86

Sigma 24-70mm f/2.8 DG DN II Art

sharpness 95

af 92

build 92

value 95

Specs side-by-side

Hide identical rows

Tamron 50-400mm f/4.5-6.3 Di III VC VXD versus Sigma 24-70mm f/2.8 DG DN II Art — full spec comparison
Spec	Tamron 50-400mm f/4.5-6.3 Di III VC VXD	Sigma 24-70mm f/2.8 DG DN II Art
Mount	—	L-Mount + Sony E
Focal length	—	24-70 mm
Aperture	—	f/2.8
Construction	—	19 elements / 15 groups
Min focus	—	0.18 m
Filter	—	82 mm
Weight	—	745 g

Tamron 50-400mm f/4.5-6.3 Di III VC VXD

Pros

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

Cons

−Mount-specific
−Older AF motor on some
−Heavier than modern counterparts

Sigma 24-70mm f/2.8 DG DN II Art

Pros

+Sharper than first-party Sony GM at 1/3 the price
+Aperture ring with click toggle
+Weather-sealed

Cons

−Heavier than Sony GM II
−Not stabilized — relies on body IBIS
−Hood plastic

FAQ: Tamron 50-400mm f/4.5-6.3 Di III VC VXD vs Sigma 24-70mm f/2.8 DG DN II Art

Which is better, Tamron 50-400mm f/4.5-6.3 Di III VC VXD or Sigma 24-70mm f/2.8 DG DN II Art? +

Sigma 24-70mm f/2.8 DG DN II Art scores 93 on our weighted rubric — ahead by 6. Your best pick depends on the sub-scores above.

Is Tamron 50-400mm f/4.5-6.3 Di III VC VXD worth the price? +

At $1,299, Tamron 50-400mm f/4.5-6.3 Di III VC VXD delivers a Specdex score of 87 — strongest in build.

Is Sigma 24-70mm f/2.8 DG DN II Art worth the price? +

At $1,099, Sigma 24-70mm f/2.8 DG DN II Art delivers a Specdex score of 93 — strongest in sharpness.

Does Tamron 50-400mm f/4.5-6.3 Di III VC VXD or Sigma 24-70mm f/2.8 DG DN II Art 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, Tamron 50-400mm f/4.5-6.3 Di III VC VXD or Sigma 24-70mm f/2.8 DG DN II Art? +

Sigma 24-70mm f/2.8 DG DN II Art — leads on sharpness (95 vs 87). Compared on the sharpness sub-score.

Which is better for build, Tamron 50-400mm f/4.5-6.3 Di III VC VXD or Sigma 24-70mm f/2.8 DG DN II Art? +

Sigma 24-70mm f/2.8 DG DN II Art — leads on build (92 vs 90). Compared on the build sub-score.