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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
Canon RF 15-35mm f/2.8L IS USM wins by 1
Canon RF 15-35mm f/2.8L IS USM — Prime/Zoom
Canon

Canon RF 15-35mm f/2.8L IS USM

Prime/Zoom

93
/ 100
From $2,299
Specdex verdict

Canon RF 15-35mm f/2.8L IS USM takes it — here’s why.

In our weighted Specdex score, Sony FE 100mm f/2.8 STF GM lands at 92 and Canon RF 15-35mm f/2.8L IS USM at 93. That puts Canon RF 15-35mm f/2.8L IS USM 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 Canon RF 15-35mm f/2.8L IS USM if…

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

Canon RF 15-35mm f/2.8L IS USM

Compared on the autofocus sub-score

Canon RF 15-35mm f/2.8L IS USM leads on af (92 vs 90).

Build

Canon RF 15-35mm f/2.8L IS USM

Compared on the build sub-score

Canon RF 15-35mm f/2.8L IS USM leads on build (94 vs 88).

Value for money

Sony FE 100mm f/2.8 STF GM

Specdex score per dollar at MSRP

Sony FE 100mm f/2.8 STF GM more score per dollar ($1,498 vs $2,299).

Sony FE 100mm f/2.8 STF GM 92
vs
93 Canon RF 15-35mm f/2.8L IS USM

Score breakdown

Sony FE 100mm f/2.8 STF GM
92
sharpness 92
af 90
build 88
value 85
Canon RF 15-35mm f/2.8L IS USM
93
sharpness 93
af 92
build 94
value 84

Specs side-by-side

Sony FE 100mm f/2.8 STF GM versus Canon RF 15-35mm f/2.8L IS USM — full spec comparison
Spec Sony FE 100mm f/2.8 STF GM Canon RF 15-35mm f/2.8L IS USM

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

Canon RF 15-35mm f/2.8L IS USM

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

FAQ: Sony FE 100mm f/2.8 STF GM vs Canon RF 15-35mm f/2.8L IS USM

Which is better, Sony FE 100mm f/2.8 STF GM or Canon RF 15-35mm f/2.8L IS USM? +

Canon RF 15-35mm f/2.8L IS USM scores 93 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 Canon RF 15-35mm f/2.8L IS USM worth the price? +

At $2,299, Canon RF 15-35mm f/2.8L IS USM delivers a Specdex score of 93 — strongest in build.

Does Sony FE 100mm f/2.8 STF GM or Canon RF 15-35mm f/2.8L IS USM 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 Canon RF 15-35mm f/2.8L IS USM? +

Canon RF 15-35mm f/2.8L IS USM — leads on af (92 vs 90). Compared on the autofocus sub-score.

Which is better for build, Sony FE 100mm f/2.8 STF GM or Canon RF 15-35mm f/2.8L IS USM? +

Canon RF 15-35mm f/2.8L IS USM — leads on build (94 vs 88). Compared on the build sub-score.