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Sony FE 50mm f/1.4 GM — GM Series · Compact · Aperture ring
Sony

Sony FE 50mm f/1.4 GM

GM Series · Compact · Aperture ring

96
/ 100
From $1,298
VS
Sony FE 50mm f/1.4 GM wins by 10
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

Sony FE 50mm f/1.4 GM takes it — here’s why.

In our weighted Specdex score, Sony FE 50mm f/1.4 GM lands at 96 and Tamron 17-28mm f/2.8 Di III RXD at 86. That puts Sony FE 50mm f/1.4 GM ahead by 10 points — a decisive margin driven mostly by its strengths in the categories below.

Pick Sony FE 50mm f/1.4 GM if…

  • ✓Best 50mm AF lens for Sony E-mount
  • ✓Compact for f/1.4 GM glass
  • ✓Click-able aperture ring

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

Sharpness

Sony FE 50mm f/1.4 GM

Compared on the sharpness sub-score

Sony FE 50mm f/1.4 GM leads on sharpness (98 vs 86).

Build

Sony FE 50mm f/1.4 GM

Compared on the build sub-score

Sony FE 50mm f/1.4 GM leads on build (96 vs 88).

Autofocus

Sony FE 50mm f/1.4 GM

Compared on the autofocus sub-score

Sony FE 50mm f/1.4 GM leads on af (98 vs 84).

Value for money

Tamron 17-28mm f/2.8 Di III RXD

Specdex score per dollar at MSRP

Tamron 17-28mm f/2.8 Di III RXD more score per dollar ($899 vs $1,298).

Sony FE 50mm f/1.4 GM 96
vs
86 Tamron 17-28mm f/2.8 Di III RXD

Score breakdown

Sony FE 50mm f/1.4 GM
96
sharpness 98
af 98
build 96
bokeh 96
value 84
Tamron 17-28mm f/2.8 Di III RXD
86
sharpness 86
af 84
build 88
bokeh 0
value 85

Specs side-by-side

Sony FE 50mm f/1.4 GM versus Tamron 17-28mm f/2.8 Di III RXD — full spec comparison
Spec Sony FE 50mm f/1.4 GM Tamron 17-28mm f/2.8 Di III RXD
Mount
Sony E
—
Focal length
50 mm
—
Aperture
f/1.4 to f/16
—
Construction
14 elements / 11 groups
—
Min focus
0.41 m
—
Filter
67 mm
—
Weight
516 g
—

Sony FE 50mm f/1.4 GM

Pros
  • +Best 50mm AF lens for Sony E-mount
  • +Compact for f/1.4 GM glass
  • +Click-able aperture ring
Cons
  • −Premium pricing
  • −No image stabilization (relies on IBIS)
  • −No filter included

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 50mm f/1.4 GM vs Tamron 17-28mm f/2.8 Di III RXD

Which is better, Sony FE 50mm f/1.4 GM or Tamron 17-28mm f/2.8 Di III RXD? +

Sony FE 50mm f/1.4 GM scores 96 on our weighted rubric — ahead by 10. Your best pick depends on the sub-scores above.

Is Sony FE 50mm f/1.4 GM worth the price? +

At $1,298, Sony FE 50mm f/1.4 GM delivers a Specdex score of 96 — strongest in sharpness.

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 50mm f/1.4 GM 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 better for sharpness, Sony FE 50mm f/1.4 GM or Tamron 17-28mm f/2.8 Di III RXD? +

Sony FE 50mm f/1.4 GM — leads on sharpness (98 vs 86). Compared on the sharpness sub-score.

Which is better for build, Sony FE 50mm f/1.4 GM or Tamron 17-28mm f/2.8 Di III RXD? +

Sony FE 50mm f/1.4 GM — leads on build (96 vs 88). Compared on the build sub-score.