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Canon EF 70-200mm f/2.8L IS III USM — Prime/zoom
Canon

Canon EF 70-200mm f/2.8L IS III USM

Prime/zoom

92
/ 100
From $2,099
VS
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
Specdex verdict

Dead heat — it comes down to priorities.

In our weighted Specdex score, Canon EF 70-200mm f/2.8L IS III USM lands at 92 and Sony FE 100mm f/2.8 STF GM at 92. With scores tied, the decision hinges on which sub-scores matter most to you.

Pick Canon EF 70-200mm f/2.8L IS III USM if…

  • ✓Proven optical formula
  • ✓Weather-sealing (L/GM/S)
  • ✓Strong resale

Pick Sony FE 100mm f/2.8 STF GM 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

Tie

Compared on the sharpness sub-score

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

Autofocus

Sony FE 100mm f/2.8 STF GM

Compared on the autofocus sub-score

Sony FE 100mm f/2.8 STF GM leads on af (90 vs 88).

Build

Canon EF 70-200mm f/2.8L IS III USM

Compared on the build sub-score

Canon EF 70-200mm f/2.8L IS III USM leads on build (90 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 $2,099).

Canon EF 70-200mm f/2.8L IS III USM 92
vs
92 Sony FE 100mm f/2.8 STF GM

Score breakdown

Canon EF 70-200mm f/2.8L IS III USM
92
sharpness 92
af 88
build 90
value 86
Sony FE 100mm f/2.8 STF GM
92
sharpness 92
af 90
build 88
value 85

Specs side-by-side

Canon EF 70-200mm f/2.8L IS III USM versus Sony FE 100mm f/2.8 STF GM — full spec comparison
Spec Canon EF 70-200mm f/2.8L IS III USM Sony FE 100mm f/2.8 STF GM

Canon EF 70-200mm f/2.8L IS III USM

Pros
  • +Proven optical formula
  • +Weather-sealing (L/GM/S)
  • +Strong resale
Cons
  • −Mount-specific
  • −Older AF motor on some
  • −Heavier than modern counterparts

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

FAQ: Canon EF 70-200mm f/2.8L IS III USM vs Sony FE 100mm f/2.8 STF GM

Which is better, Canon EF 70-200mm f/2.8L IS III USM or Sony FE 100mm f/2.8 STF GM? +

Both score 92 on our weighted rubric — tied. Your best pick depends on the sub-scores above.

Is Canon EF 70-200mm f/2.8L IS III USM worth the price? +

At $2,099, Canon EF 70-200mm f/2.8L IS III USM delivers a Specdex score of 92 — strongest in sharpness.

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.

Does Canon EF 70-200mm f/2.8L IS III USM or Sony FE 100mm f/2.8 STF GM 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, Canon EF 70-200mm f/2.8L IS III USM or Sony FE 100mm f/2.8 STF GM? +

Sony FE 100mm f/2.8 STF GM — leads on af (90 vs 88). Compared on the autofocus sub-score.

Which is better for build, Canon EF 70-200mm f/2.8L IS III USM or Sony FE 100mm f/2.8 STF GM? +

Canon EF 70-200mm f/2.8L IS III USM — leads on build (90 vs 88). Compared on the build sub-score.