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Sony FE 85mm f/1.8 — Prime/Zoom
Sony

Sony FE 85mm f/1.8

Prime/Zoom

86
/ 100
From $598
VS
Tamron 17-28mm f/2.8 Di III RXD — Prime/Zoom
Tamron

Tamron 17-28mm f/2.8 Di III RXD

Prime/Zoom

86
/ 100
From $899
Specdex verdict

Dead heat — it comes down to priorities.

In our weighted Specdex score, Sony FE 85mm f/1.8 lands at 86 and Tamron 17-28mm f/2.8 Di III RXD at 86. With scores tied, the decision hinges on which sub-scores matter most to you.

Pick Sony FE 85mm f/1.8 if…

  • ✓Fast aperture
  • ✓Quiet autofocus
  • ✓Weather-sealed (most)

Pick Tamron 17-28mm f/2.8 Di III RXD if…

  • ✓Fast aperture
  • ✓Quiet autofocus
  • ✓Weather-sealed (most)
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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

Tie

Compared on the sharpness sub-score

Effectively tied — neither pulls a 2-point weighted lead.

Autofocus

Tie

Compared on the autofocus sub-score

Effectively tied — neither pulls a 2-point weighted lead.

Value for money

Sony FE 85mm f/1.8

Specdex score per dollar at MSRP

Sony FE 85mm f/1.8 more score per dollar ($598 vs $899).

Sony FE 85mm f/1.8 86
vs
86 Tamron 17-28mm f/2.8 Di III RXD

Score breakdown

Sony FE 85mm f/1.8
86
sharpness 86
af 84
build 88
value 85
Tamron 17-28mm f/2.8 Di III RXD
86
sharpness 86
af 84
build 88
value 85

Specs side-by-side

Sony FE 85mm f/1.8 versus Tamron 17-28mm f/2.8 Di III RXD — full spec comparison
Spec Sony FE 85mm f/1.8 Tamron 17-28mm f/2.8 Di III RXD

Sony FE 85mm f/1.8

Pros
  • +Fast aperture
  • +Quiet autofocus
  • +Weather-sealed (most)
Cons
  • −Mount-specific
  • −Weight varies
  • −Price scales with quality

Tamron 17-28mm f/2.8 Di III RXD

Pros
  • +Fast aperture
  • +Quiet autofocus
  • +Weather-sealed (most)
Cons
  • −Mount-specific
  • −Weight varies
  • −Price scales with quality

FAQ: Sony FE 85mm f/1.8 vs Tamron 17-28mm f/2.8 Di III RXD

Which is better, Sony FE 85mm f/1.8 or Tamron 17-28mm f/2.8 Di III RXD? +

Both score 86 on our weighted rubric — tied. Your best pick depends on the sub-scores above.

Is Sony FE 85mm f/1.8 worth the price? +

At $598, Sony FE 85mm f/1.8 delivers a Specdex score of 86 — strongest in build.

Is Tamron 17-28mm f/2.8 Di III RXD worth the price? +

At $899, Tamron 17-28mm f/2.8 Di III RXD delivers a Specdex score of 86 — strongest in build.

Does Sony FE 85mm f/1.8 or Tamron 17-28mm f/2.8 Di III RXD 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 the better value, Sony FE 85mm f/1.8 or Tamron 17-28mm f/2.8 Di III RXD? +

Sony FE 85mm f/1.8 — more score per dollar ($598 vs $899). Specdex score per dollar at MSRP.