Sony FE 100mm f/2.8 STF GM OSS vs Viltrox AF 85mm f/2.0 EVO

Both are Sony E mount primes for portrait 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 100mm f/2.8 STF GM OSS	Viltrox AF 85mm f/2.0 EVO
Focal length	100mm	85mm
Max aperture	f/2.8	f/2.0
Type	prime	prime
Coverage	full-frame	full-frame
Mount	Sony E	Sony E

Which should you buy?

the Viltrox AF 85mm f/2.0 EVO opens wider (f/2.0) — brighter in low light and more background blur
the Viltrox AF 85mm f/2.0 EVO (85mm) is wider — more in the frame for street and interiors; the Sony FE 100mm f/2.8 STF GM OSS (100mm) is tighter — more reach and compression for portraits
the Sony FE 100mm f/2.8 STF GM OSS is first-party (Sony) for guaranteed full autofocus and in-camera corrections; the Viltrox AF 85mm f/2.0 EVO is third-party — usually the value pick

Where to buy

Sony SEL100F28GM 100mm f2.8 Medium-telephoto Fixed Prime Camera Lens, Black

Sony FE 100mm f/2.8 STF GM OSSSee price on Amazon

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

VILTROX 85mm F2.0 EVO FE Lens for Sony E, AF 85mm f/2 E-Mount Full Frame Auto Focus Prime Portrait Lens for Sony FE Came

Viltrox AF 85mm f/2.0 EVOSee price on Amazon

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FAQ

What's the difference between the Sony FE 100mm f/2.8 STF GM OSS and the Viltrox AF 85mm f/2.0 EVO?
The Sony FE 100mm f/2.8 STF GM OSS is 100mm f/2.8 prime, full-frame; the Viltrox AF 85mm f/2.0 EVO is 85mm f/2.0 prime, full-frame. Both fit the Sony E mount.

Which is better in low light, the Sony FE 100mm f/2.8 STF GM OSS or the Viltrox AF 85mm f/2.0 EVO?
The Viltrox AF 85mm f/2.0 EVO — its f/2.0 maximum aperture lets in more light and gives more background blur than the f/2.8 of the other.

Do the Sony FE 100mm f/2.8 STF GM OSS and Viltrox AF 85mm f/2.0 EVO 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: Tamron 28-75mm f/2.8 Di III VXD G2 vs Sony FE 28-60mm f/4-5.6 · Sigma 50mm f/1.4 DG DN Art vs Sony FE 50mm f/1.4 GM · Sony FE 100mm f/2.8 STF GM OSS vs Viltrox AF 90mm f/2.2 EVO · Sony FE 300mm f/2.8 GM OSS vs Sigma 200mm f/2 DG OS Sports · all Sony E lenses · all comparisons

Sony FE 100mm f/2.8 STF GM OSSAffiliate linkSee price on Amazon