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Canon RF 28-70mm f/2L USM — Prime/Zoom
Canon

Canon RF 28-70mm f/2L USM

Prime/Zoom

96
/ 100
From $2,999
VS
Canon RF 28-70mm f/2L USM wins by 3
Sigma 24-70mm f/2.8 DG DN II Art — L/E mount · Constant f/2.8 · 745g
Sigma

Sigma 24-70mm f/2.8 DG DN II Art

L/E mount · Constant f/2.8 · 745g

93
/ 100
From $1,099
Specdex verdict

Canon RF 28-70mm f/2L USM takes it — here’s why.

In our weighted Specdex score, Canon RF 28-70mm f/2L USM lands at 96 and Sigma 24-70mm f/2.8 DG DN II Art at 93. That puts Canon RF 28-70mm f/2L USM ahead by 3 points — a narrow margin driven mostly by its strengths in the categories below.

Pick Canon RF 28-70mm f/2L USM if…

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

Pick Sigma 24-70mm f/2.8 DG DN II Art if…

  • ✓Sharper than first-party Sony GM at 1/3 the price
  • ✓Aperture ring with click toggle
  • ✓Weather-sealed
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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 28-70mm f/2L USM

Compared on the autofocus sub-score

Canon RF 28-70mm f/2L USM leads on af (95 vs 92).

Build

Canon RF 28-70mm f/2L USM

Compared on the build sub-score

Canon RF 28-70mm f/2L USM leads on build (94 vs 92).

Value for money

Sigma 24-70mm f/2.8 DG DN II Art

Specdex score per dollar at MSRP

Sigma 24-70mm f/2.8 DG DN II Art more score per dollar ($1,099 vs $2,999).

Canon RF 28-70mm f/2L USM 96
vs
93 Sigma 24-70mm f/2.8 DG DN II Art

Score breakdown

Canon RF 28-70mm f/2L USM
96
sharpness 96
af 95
build 94
value 84
Sigma 24-70mm f/2.8 DG DN II Art
93
sharpness 95
af 92
build 92
value 95

Specs side-by-side

Canon RF 28-70mm f/2L USM versus Sigma 24-70mm f/2.8 DG DN II Art — full spec comparison
Spec Canon RF 28-70mm f/2L USM Sigma 24-70mm f/2.8 DG DN II Art
Mount
—
L-Mount + Sony E
Focal length
—
24-70 mm
Aperture
—
f/2.8
Construction
—
19 elements / 15 groups
Min focus
—
0.18 m
Filter
—
82 mm
Weight
—
745 g

Canon RF 28-70mm f/2L USM

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

Sigma 24-70mm f/2.8 DG DN II Art

Pros
  • +Sharper than first-party Sony GM at 1/3 the price
  • +Aperture ring with click toggle
  • +Weather-sealed
Cons
  • −Heavier than Sony GM II
  • −Not stabilized — relies on body IBIS
  • −Hood plastic

FAQ: Canon RF 28-70mm f/2L USM vs Sigma 24-70mm f/2.8 DG DN II Art

Which is better, Canon RF 28-70mm f/2L USM or Sigma 24-70mm f/2.8 DG DN II Art? +

Canon RF 28-70mm f/2L USM scores 96 on our weighted rubric — ahead by 3. Your best pick depends on the sub-scores above.

Is Canon RF 28-70mm f/2L USM worth the price? +

At $2,999, Canon RF 28-70mm f/2L USM delivers a Specdex score of 96 — strongest in sharpness.

Is Sigma 24-70mm f/2.8 DG DN II Art worth the price? +

At $1,099, Sigma 24-70mm f/2.8 DG DN II Art delivers a Specdex score of 93 — strongest in sharpness.

Does Canon RF 28-70mm f/2L USM or Sigma 24-70mm f/2.8 DG DN II Art 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 RF 28-70mm f/2L USM or Sigma 24-70mm f/2.8 DG DN II Art? +

Canon RF 28-70mm f/2L USM — leads on af (95 vs 92). Compared on the autofocus sub-score.

Which is better for build, Canon RF 28-70mm f/2L USM or Sigma 24-70mm f/2.8 DG DN II Art? +

Canon RF 28-70mm f/2L USM — leads on build (94 vs 92). Compared on the build sub-score.