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Sony FE 100mm f/2.8 STF GM — Prime/Zoom
Sony

Sony FE 100mm f/2.8 STF GM

Prime/Zoom

92
/ 100
From $1,498
VS
Sony FE 100mm f/2.8 STF GM wins by 1
Tamron 28-75mm f/2.8 Di III VXD G2 — Sony E · f/2.8 · 540g · $899
Tamron

Tamron 28-75mm f/2.8 Di III VXD G2

Sony E · f/2.8 · 540g · $899

91
/ 100
From $899
Specdex verdict

Sony FE 100mm f/2.8 STF GM takes it — here’s why.

In our weighted Specdex score, Sony FE 100mm f/2.8 STF GM lands at 92 and Tamron 28-75mm f/2.8 Di III VXD G2 at 91. That puts Sony FE 100mm f/2.8 STF GM ahead by 1 points — a narrow margin driven mostly by its strengths in the categories below.

Pick Sony FE 100mm f/2.8 STF GM if…

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

Pick Tamron 28-75mm f/2.8 Di III VXD G2 if…

  • ✓540g — lightest f/2.8 24-70 alternative
  • ✓Better than first-party G Master at $899
  • ✓Quiet VXD AF motor
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Winner by scenario

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

Sharpness

Tie

Compared on the sharpness sub-score

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

Autofocus

Tamron 28-75mm f/2.8 Di III VXD G2

Compared on the autofocus sub-score

Tamron 28-75mm f/2.8 Di III VXD G2 leads on af (92 vs 90).

Build

Tie

Compared on the build sub-score

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

Value for money

Tamron 28-75mm f/2.8 Di III VXD G2

Specdex score per dollar at MSRP

Tamron 28-75mm f/2.8 Di III VXD G2 more score per dollar ($899 vs $1,498).

Sony FE 100mm f/2.8 STF GM 92
vs
91 Tamron 28-75mm f/2.8 Di III VXD G2

Score breakdown

Sony FE 100mm f/2.8 STF GM
92
sharpness 92
af 90
build 88
value 85
Tamron 28-75mm f/2.8 Di III VXD G2
91
sharpness 92
af 92
build 88
value 96

Specs side-by-side

Sony FE 100mm f/2.8 STF GM versus Tamron 28-75mm f/2.8 Di III VXD G2 — full spec comparison
Spec Sony FE 100mm f/2.8 STF GM Tamron 28-75mm f/2.8 Di III VXD G2
Mount
—
Sony E
Focal length
—
28-75 mm
Aperture
—
f/2.8
Construction
—
17 elements / 15 groups
Min focus
—
0.18 m
Filter
—
67 mm
Weight
—
540 g

Sony FE 100mm f/2.8 STF GM

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

Tamron 28-75mm f/2.8 Di III VXD G2

Pros
  • +540g — lightest f/2.8 24-70 alternative
  • +Better than first-party G Master at $899
  • +Quiet VXD AF motor
Cons
  • −28mm wide-end vs 24mm of Sony GM
  • −No image stabilization
  • −No fluorine front coating

FAQ: Sony FE 100mm f/2.8 STF GM vs Tamron 28-75mm f/2.8 Di III VXD G2

Which is better, Sony FE 100mm f/2.8 STF GM or Tamron 28-75mm f/2.8 Di III VXD G2? +

Sony FE 100mm f/2.8 STF GM scores 92 on our weighted rubric — ahead by 1. Your best pick depends on the sub-scores above.

Is Sony FE 100mm f/2.8 STF GM worth the price? +

At $1,498, Sony FE 100mm f/2.8 STF GM delivers a Specdex score of 92 — strongest in sharpness.

Is Tamron 28-75mm f/2.8 Di III VXD G2 worth the price? +

At $899, Tamron 28-75mm f/2.8 Di III VXD G2 delivers a Specdex score of 91 — strongest in value.

Does Sony FE 100mm f/2.8 STF GM or Tamron 28-75mm f/2.8 Di III VXD G2 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 autofocus, Sony FE 100mm f/2.8 STF GM or Tamron 28-75mm f/2.8 Di III VXD G2? +

Tamron 28-75mm f/2.8 Di III VXD G2 — leads on af (92 vs 90). Compared on the autofocus sub-score.

Which is the better value, Sony FE 100mm f/2.8 STF GM or Tamron 28-75mm f/2.8 Di III VXD G2? +

Tamron 28-75mm f/2.8 Di III VXD G2 — more score per dollar ($899 vs $1,498). Specdex score per dollar at MSRP.