Canon

Canon RF 100-500mm f/4.5-7.1L IS USM

Name: Canon RF 100-500mm f/4.5-7.1L IS USM
Brand: Canon
SKU: canon-rf-100-500mm-f-4-5-7-1l-is-usm

Prime/Zoom

/ 100

From $2,699

Sigma

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

L/E mount · Constant f/2.8 · 745g

/ 100

From $1,099

Specdex verdict

Dead heat — it comes down to priorities.

In our weighted Specdex score, Canon RF 100-500mm f/4.5-7.1L 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 100-500mm f/4.5-7.1L 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

Share this comparison: Share to Reddit X / Twitter

Winner by scenario

Derived from the sub-score breakdown · not a separate test

Sharpness

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

Compared on the sharpness sub-score

Sigma 24-70mm f/2.8 DG DN II Art leads on sharpness (95 vs 93).

Build

Canon RF 100-500mm f/4.5-7.1L IS USM

Compared on the build sub-score

Canon RF 100-500mm f/4.5-7.1L IS USM leads on build (94 vs 92).

Autofocus

Tie

Compared on the autofocus sub-score

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

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 $2,699).

Canon RF 100-500mm f/4.5-7.1L IS USM 93

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

Score breakdown

Canon RF 100-500mm f/4.5-7.1L IS USM

sharpness 93

af 92

build 94

value 84

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

sharpness 95

af 92

build 92

value 95

Specs side-by-side

Hide identical rows

Canon RF 100-500mm f/4.5-7.1L IS USM versus Sigma 24-70mm f/2.8 DG DN II Art — full spec comparison
Spec	Canon RF 100-500mm f/4.5-7.1L 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 100-500mm f/4.5-7.1L 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 100-500mm f/4.5-7.1L IS USM vs Sigma 24-70mm f/2.8 DG DN II Art

Which is better, Canon RF 100-500mm f/4.5-7.1L 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 100-500mm f/4.5-7.1L IS USM worth the price? +

At $2,699, Canon RF 100-500mm f/4.5-7.1L 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 100-500mm f/4.5-7.1L 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.

Which is better for sharpness, Canon RF 100-500mm f/4.5-7.1L IS USM or Sigma 24-70mm f/2.8 DG DN II Art? +

Sigma 24-70mm f/2.8 DG DN II Art — leads on sharpness (95 vs 93). Compared on the sharpness sub-score.

Which is better for build, Canon RF 100-500mm f/4.5-7.1L IS USM or Sigma 24-70mm f/2.8 DG DN II Art? +

Canon RF 100-500mm f/4.5-7.1L IS USM — leads on build (94 vs 92). Compared on the build sub-score.