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

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

In our weighted Specdex score, Sony FE 70-200mm f/4 G OSS II lands at 90 and Tamron 20-40mm f/2.8 Di III VXD at 85. 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 Sony FE 70-200mm f/4 G OSS II if…

  • ✓Fast autofocus
  • ✓Weather-sealed
  • ✓Premium optics

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

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).

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

Score breakdown

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

Specs side-by-side

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

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

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

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

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

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 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.

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

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

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