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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
VS
Sony FE 70-200mm f/4 G OSS II wins by 5
Sony FE 70-200mm f/4 G OSS II — Prime/Zoom
Sony

Sony FE 70-200mm f/4 G OSS II

Prime/Zoom

90
/ 100
From $1,698
Specdex verdict

Sony FE 70-200mm f/4 G OSS II takes it — here’s why.

In our weighted Specdex score, Tamron 20-40mm f/2.8 Di III VXD lands at 85 and Sony FE 70-200mm f/4 G OSS II at 90. That puts Sony FE 70-200mm f/4 G OSS II ahead by 5 points — a decisive margin driven mostly by its strengths in the categories below.

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

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

Pick Sony FE 70-200mm f/4 G OSS II if…

  • ✓Fast autofocus
  • ✓Weather-sealed
  • ✓Premium optics
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Winner by scenario

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

Build

Sony FE 70-200mm f/4 G OSS II

Compared on the build sub-score

Sony FE 70-200mm f/4 G OSS II leads on build (94 vs 90).

Sharpness

Sony FE 70-200mm f/4 G OSS II

Compared on the sharpness sub-score

Sony FE 70-200mm f/4 G OSS II leads on sharpness (90 vs 85).

Autofocus

Sony FE 70-200mm f/4 G OSS II

Compared on the autofocus sub-score

Sony FE 70-200mm f/4 G OSS II leads on af (89 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 $1,698).

Tamron 20-40mm f/2.8 Di III VXD 85
vs
90 Sony FE 70-200mm f/4 G OSS II

Score breakdown

Tamron 20-40mm f/2.8 Di III VXD
85
sharpness 85
af 81
build 90
value 86
Sony FE 70-200mm f/4 G OSS II
90
sharpness 90
af 89
build 94
value 84

Specs side-by-side

Tamron 20-40mm f/2.8 Di III VXD versus Sony FE 70-200mm f/4 G OSS II — full spec comparison
Spec Tamron 20-40mm f/2.8 Di III VXD Sony FE 70-200mm f/4 G OSS II

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

Sony FE 70-200mm f/4 G OSS II

Pros
  • +Fast autofocus
  • +Weather-sealed
  • +Premium optics
Cons
  • −Heavy
  • −Expensive
  • −Focus breathing varies

FAQ: Tamron 20-40mm f/2.8 Di III VXD vs Sony FE 70-200mm f/4 G OSS II

Which is better, Tamron 20-40mm f/2.8 Di III VXD or Sony FE 70-200mm f/4 G OSS II? +

Sony FE 70-200mm f/4 G OSS II scores 90 on our weighted rubric — ahead by 5. Your best pick depends on the sub-scores above.

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.

Is Sony FE 70-200mm f/4 G OSS II worth the price? +

At $1,698, Sony FE 70-200mm f/4 G OSS II delivers a Specdex score of 90 — strongest in build.

Does Tamron 20-40mm f/2.8 Di III VXD or Sony FE 70-200mm f/4 G OSS II 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, Tamron 20-40mm f/2.8 Di III VXD or Sony FE 70-200mm f/4 G OSS II? +

Sony FE 70-200mm f/4 G OSS II — leads on build (94 vs 90). Compared on the build sub-score.

Which is better for sharpness, Tamron 20-40mm f/2.8 Di III VXD or Sony FE 70-200mm f/4 G OSS II? +

Sony FE 70-200mm f/4 G OSS II — leads on sharpness (90 vs 85). Compared on the sharpness sub-score.