Sony FE 100-400mm f/4.5 GM OSS vs Sony FE 400-800mm f/6.3-8 G OSS
Both are Sony E mount zooms for sports & action and wildlife — here's how the specs differ and which to pick. Every spec is from the manufacturer's own catalog.
| Spec | Sony FE 100-400mm f/4.5 GM OSS | Sony FE 400-800mm f/6.3-8 G OSS |
|---|---|---|
| Focal length | 100-400mm | 400-800mm |
| Max aperture | f/4.5 | f/6.3-8 |
| Type | zoom | zoom |
| Coverage | full-frame | full-frame |
| Mount | Sony E | Sony E |
Which should you buy?
- the Sony FE 100-400mm f/4.5 GM OSS opens wider (f/4.5) — brighter in low light and more background blur
- the Sony FE 100-400mm f/4.5 GM OSS covers 100-400mm and the Sony FE 400-800mm f/6.3-8 G OSS covers 400-800mm — pick the range that matches what you shoot
Where to buy
Sony FE 100-400mm f/4.5 GM OSSSee price on Amazon
Sony FE 400-800mm f/6.3-8 G OSSSee price on Amazon
FAQ
What's the difference between the Sony FE 100-400mm f/4.5 GM OSS and the Sony FE 400-800mm f/6.3-8 G OSS?
The Sony FE 100-400mm f/4.5 GM OSS is 100-400mm f/4.5 zoom, full-frame; the Sony FE 400-800mm f/6.3-8 G OSS is 400-800mm f/6.3-8 zoom, full-frame. Both fit the Sony E mount.
Which is better in low light, the Sony FE 100-400mm f/4.5 GM OSS or the Sony FE 400-800mm f/6.3-8 G OSS?
The Sony FE 100-400mm f/4.5 GM OSS — its f/4.5 maximum aperture lets in more light and gives more background blur than the f/6.3-8 of the other.
Do the Sony FE 100-400mm f/4.5 GM OSS and Sony FE 400-800mm f/6.3-8 G OSS fit the same camera?
Yes — both are Sony E mount lenses, so they fit Sony a7/a9/a1 (full-frame) and a6000-series (APS-C).
More Sony E comparisons: Sigma 35mm f/1.4 DG DN Art vs Sony FE 35mm f/1.4 GM · Sony FE 50mm f/1.4 GM vs Sony FE 85mm f/1.4 GM II · Sony FE 100-400mm f/5.6-8 OSS vs Sony FE 400-800mm f/6.3-8 G OSS · Sony FE 28mm f/2 vs Yongnuo YN 35mm f/1.8S DA DSM WL · all Sony E lenses · all comparisons