Sony FE 100-400mm f/4.5-5.6 GM OSS vs Sony FE 70-200mm f/4 G OSS

Both are Sony E mount zooms for sports & action and telephoto — here's how the specs differ and which to pick. Every spec is from the manufacturer's own catalog.

Last verified 2026-09-01 · Sony E mount · prices change — check the retailer

Spec	Sony FE 100-400mm f/4.5-5.6 GM OSS	Sony FE 70-200mm f/4 G OSS
Focal length	100-400mm	70-200mm
Max aperture	f/4.5-5.6	f/4
Type	zoom	zoom
Coverage	full-frame	full-frame
Mount	Sony E	Sony E

Which should you buy?

the Sony FE 70-200mm f/4 G OSS opens wider (f/4) — brighter in low light and more background blur
the Sony FE 100-400mm f/4.5-5.6 GM OSS covers 100-400mm and the Sony FE 70-200mm f/4 G OSS covers 70-200mm — pick the range that matches what you shoot

Where to buy

Sony FE 100-400mm f/4.5-5.6 GM OSSSee price on Amazon

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Sony FE 70-200mm F4 G OSS Interchangeable Lens for Sony (White/Black)

Sony FE 70-200mm f/4 G OSSSee price on Amazon Amazon has no new-stock listing for this one right now — this button runs an Amazon search for it rather than opening a product page.

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FAQ

What's the difference between the Sony FE 100-400mm f/4.5-5.6 GM OSS and the Sony FE 70-200mm f/4 G OSS?
The Sony FE 100-400mm f/4.5-5.6 GM OSS is 100-400mm f/4.5-5.6 zoom, full-frame; the Sony FE 70-200mm f/4 G OSS is 70-200mm f/4 zoom, full-frame. Both fit the Sony E mount.

Which is better in low light, the Sony FE 100-400mm f/4.5-5.6 GM OSS or the Sony FE 70-200mm f/4 G OSS?
The Sony FE 70-200mm f/4 G OSS — its f/4 maximum aperture lets in more light and gives more background blur than the f/4.5-5.6 of the other.

Do the Sony FE 100-400mm f/4.5-5.6 GM OSS and Sony FE 70-200mm f/4 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).

Citing these specs? Go ahead — manufacturer data, last verified 2026-09-01. Copy a ready-made reference:

More Sony E comparisons: Sony FE 50mm f/1.4 GM vs Sony FE 85mm f/1.4 GM II · Sigma 100-400mm f/5-6.3 DG DN OS vs Tamron 150-500mm f/5-6.7 Di III VC VXD · Sony FE 200-600mm f/5.6-6.3 G OSS vs Sony FE 70-200mm f/2.8 GM OSS II · Sony FE 24-105mm f/4 G OSS vs Sony FE 28-70mm f/2 GM · all Sony E lenses · all comparisons

Sony FE 100-400mm f/4.5-5.6 GM OSSAffiliate linkSee price on Amazon