Canon
Canon RF 15-35mm f/2.8L IS USM
Prime/Zoom
93
/ 100
From $2,299
VS
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
Dead heat — it comes down to priorities.
In our weighted Specdex score, Canon RF 15-35mm f/2.8L IS USM lands at 93 and Sigma 24-70mm f/2.8 DG DN II Art at 93. With scores tied, the decision hinges on which sub-scores matter most to you.
Pick Canon RF 15-35mm f/2.8L IS 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
Canon RF 15-35mm f/2.8L IS USM 93
vs 93 Sigma 24-70mm f/2.8 DG DN II Art
Score breakdown
Canon RF 15-35mm f/2.8L IS USM
93 sharpness 93
af 92
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
| Spec | Canon RF 15-35mm f/2.8L IS 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 15-35mm f/2.8L IS 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 15-35mm f/2.8L IS USM vs Sigma 24-70mm f/2.8 DG DN II Art
Which is better, Canon RF 15-35mm f/2.8L IS USM or Sigma 24-70mm f/2.8 DG DN II Art? +
Both score 93 on our weighted rubric — tied. Your best pick depends on the sub-scores above.
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.
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 15-35mm f/2.8L IS 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.