FitMyLensthe lens-by-mount reference

Sony FE 100-400mm f/4.5-5.6 GM OSS vs Sony FE 70-300mm f/4.5-5.6 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 2026-06-21 · Sony E mount · prices change — check the retailer

SpecSony FE 100-400mm f/4.5-5.6 GM OSSSony FE 70-300mm f/4.5-5.6 G OSS
Focal length100-400mm70-300mm
Max aperturef/4.5-5.6f/4.5-5.6
Typezoomzoom
Coveragefull-framefull-frame
MountSony ESony E

Which should you buy?

Where to buy

Check the Sony FE 100-400mm f/4.5-5.6 GM OSS price on Amazon →

Check the Sony FE 70-300mm f/4.5-5.6 G OSS price on Amazon →

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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 70-300mm f/4.5-5.6 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 70-300mm f/4.5-5.6 G OSS is 70-300mm f/4.5-5.6 zoom, full-frame. Both fit the Sony E mount.

Do the Sony FE 100-400mm f/4.5-5.6 GM OSS and Sony FE 70-300mm f/4.5-5.6 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 16mm f/1.4 DC DN Contemporary vs Sony E 15mm f/1.4 G · Sigma 50mm f/1.4 DG DN Art vs Sony FE 50mm f/1.4 GM · Sony FE 40mm f/2.5 G vs Sony FE 50mm f/2.5 G · Sony FE 20-70mm f/4 G vs Tamron 20-40mm f/2.8 Di III VXD · all Sony E lenses · all comparisons