Sony FE 100-400mm f/4.5-5.6 GM OSS
Prime/Zoom
Sigma 24-70mm f/2.8 DG DN II Art
L/E mount · Constant f/2.8 · 745g
Dead heat — it comes down to priorities.
In our weighted Specdex score, Sony FE 100-400mm f/4.5-5.6 GM OSS 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 Sony FE 100-400mm f/4.5-5.6 GM OSS 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
Winner by scenario
Derived from the sub-score breakdown · not a separate testSharpness
Sigma 24-70mm f/2.8 DG DN II ArtCompared on the sharpness sub-score
Sigma 24-70mm f/2.8 DG DN II Art leads on sharpness (95 vs 93).
Build
Sony FE 100-400mm f/4.5-5.6 GM OSSCompared on the build sub-score
Sony FE 100-400mm f/4.5-5.6 GM OSS leads on build (94 vs 92).
Autofocus
TieCompared 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 ArtSpecdex score per dollar at MSRP
Sigma 24-70mm f/2.8 DG DN II Art more score per dollar ($1,099 vs $2,498).
Score breakdown
Specs side-by-side
| Spec | Sony FE 100-400mm f/4.5-5.6 GM OSS | 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 |
Sony FE 100-400mm f/4.5-5.6 GM OSS
- +Fast autofocus
- +Weather-sealed
- +Premium optics
- −Heavy
- −Expensive
- −Focus breathing varies
Sigma 24-70mm f/2.8 DG DN II Art
- +Sharper than first-party Sony GM at 1/3 the price
- +Aperture ring with click toggle
- +Weather-sealed
- −Heavier than Sony GM II
- −Not stabilized — relies on body IBIS
- −Hood plastic
FAQ: Sony FE 100-400mm f/4.5-5.6 GM OSS vs Sigma 24-70mm f/2.8 DG DN II Art
Which is better, Sony FE 100-400mm f/4.5-5.6 GM OSS 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 Sony FE 100-400mm f/4.5-5.6 GM OSS worth the price? +
At $2,498, Sony FE 100-400mm f/4.5-5.6 GM OSS 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 Sony FE 100-400mm f/4.5-5.6 GM OSS 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, Sony FE 100-400mm f/4.5-5.6 GM OSS 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, Sony FE 100-400mm f/4.5-5.6 GM OSS or Sigma 24-70mm f/2.8 DG DN II Art? +
Sony FE 100-400mm f/4.5-5.6 GM OSS — leads on build (94 vs 92). Compared on the build sub-score.