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Sigma 24-70mm f/2.8 DG DN II Art — Mirrorless standard zoom · 745 g
Sigma

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

Mirrorless standard zoom · 745 g

90
/ 100
From $1,199
VS
Sigma 24-70mm f/2.8 DG DN II Art wins by 5
Tamron 20-40mm f/2.8 Di III VXD — Prime/zoom
Tamron

Tamron 20-40mm f/2.8 Di III VXD

Prime/zoom

85
/ 100
From $699
Specdex verdict

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

In our weighted Specdex score, Sigma 24-70mm f/2.8 DG DN II Art lands at 90 and Tamron 20-40mm f/2.8 Di III VXD at 85. That puts Sigma 24-70mm f/2.8 DG DN II Art ahead by 5 points — a decisive margin driven mostly by its strengths in the categories below.

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

  • ✓Great optics for half the price of GM
  • ✓Dual HLA motors
  • ✓Solid sealing

Pick Tamron 20-40mm f/2.8 Di III VXD 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

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 (92 vs 85).

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 (90 vs 81).

Value for money

Tamron 20-40mm f/2.8 Di III VXD

Specdex score per dollar at MSRP

Tamron 20-40mm f/2.8 Di III VXD more score per dollar ($699 vs $1,199).

Sigma 24-70mm f/2.8 DG DN II Art 90
vs
85 Tamron 20-40mm f/2.8 Di III VXD

Score breakdown

Sigma 24-70mm f/2.8 DG DN II Art
90
sharpness 92
af 90
build 90
value 96
Tamron 20-40mm f/2.8 Di III VXD
85
sharpness 85
af 81
build 90
value 86

Specs side-by-side

Sigma 24-70mm f/2.8 DG DN II Art versus Tamron 20-40mm f/2.8 Di III VXD — full spec comparison
Spec Sigma 24-70mm f/2.8 DG DN II Art Tamron 20-40mm f/2.8 Di III VXD
Mount
Sony E, L-Mount
—
Aperture
f/2.8
—
Weight
745 g
—

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

Pros
  • +Great optics for half the price of GM
  • +Dual HLA motors
  • +Solid sealing
Cons
  • −Slightly slower AF than GM II
  • −Heavier than GM II
  • −Focus breathing present

Tamron 20-40mm f/2.8 Di III VXD

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 24-70mm f/2.8 DG DN II Art vs Tamron 20-40mm f/2.8 Di III VXD

Which is better, Sigma 24-70mm f/2.8 DG DN II Art or Tamron 20-40mm f/2.8 Di III VXD? +

Sigma 24-70mm f/2.8 DG DN II Art scores 90 on our weighted rubric — ahead by 5. Your best pick depends on the sub-scores above.

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

At $1,199, Sigma 24-70mm f/2.8 DG DN II Art delivers a Specdex score of 90 — strongest in value.

Is Tamron 20-40mm f/2.8 Di III VXD worth the price? +

At $699, Tamron 20-40mm f/2.8 Di III VXD delivers a Specdex score of 85 — strongest in build.

Does Sigma 24-70mm f/2.8 DG DN II Art or Tamron 20-40mm f/2.8 Di III VXD 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 24-70mm f/2.8 DG DN II Art or Tamron 20-40mm f/2.8 Di III VXD? +

Sigma 24-70mm f/2.8 DG DN II Art — leads on sharpness (92 vs 85). Compared on the sharpness sub-score.

Which is better for autofocus, Sigma 24-70mm f/2.8 DG DN II Art or Tamron 20-40mm f/2.8 Di III VXD? +

Sigma 24-70mm f/2.8 DG DN II Art — leads on af (90 vs 81). Compared on the autofocus sub-score.