Sony FE 400mm f/4.5 GM OSS vs Sigma 500mm f/5.6 DG DN OS Sports

Both are Sony E mount primes for sports & action and wildlife — 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 400mm f/4.5 GM OSS	Sigma 500mm f/5.6 DG DN OS Sports
Focal length	400mm	500mm
Max aperture	f/4.5	f/5.6
Type	prime	prime
Coverage	full-frame	full-frame
Mount	Sony E	Sony E

Which should you buy?

the Sony FE 400mm f/4.5 GM OSS opens wider (f/4.5) — brighter in low light and more background blur
the Sony FE 400mm f/4.5 GM OSS (400mm) is wider — more in the frame for street and interiors; the Sigma 500mm f/5.6 DG DN OS Sports (500mm) is tighter — more reach and compression for portraits
the Sony FE 400mm f/4.5 GM OSS is first-party (Sony) for guaranteed full autofocus and in-camera corrections; the Sigma 500mm f/5.6 DG DN OS Sports is third-party — usually the value pick

Where to buy

Sony FE 400mm F4.5 GM OSS | Lightweight 400mm F4.5 G MasterTM reach, built for handheld freedom.

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

Amazon links are affiliate links — we may earn a commission at no extra cost to you.

Sigma 500mm f/5.6 DG DN OS SportsSee price on Amazon

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FAQ

What's the difference between the Sony FE 400mm f/4.5 GM OSS and the Sigma 500mm f/5.6 DG DN OS Sports?
The Sony FE 400mm f/4.5 GM OSS is 400mm f/4.5 prime, full-frame; the Sigma 500mm f/5.6 DG DN OS Sports is 500mm f/5.6 prime, full-frame. Both fit the Sony E mount.

Which is better in low light, the Sony FE 400mm f/4.5 GM OSS or the Sigma 500mm f/5.6 DG DN OS Sports?
The Sony FE 400mm f/4.5 GM OSS — its f/4.5 maximum aperture lets in more light and gives more background blur than the f/5.6 of the other.

Do the Sony FE 400mm f/4.5 GM OSS and Sigma 500mm f/5.6 DG DN OS Sports 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: Sigma 100-400mm f/5-6.3 DG DN OS vs Tamron 150-500mm f/5-6.7 Di III VC VXD · Sony E 11mm f/1.8 vs Viltrox AF 13mm f/1.4 · Sony FE 600mm f/6.3 GM OSS vs Sigma 500mm f/5.6 DG DN OS Sports · Sigma 20mm f/1.4 DG DN Art vs Samyang AF 12mm f/2 E · all Sony E lenses · all comparisons

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