Yongnuo YN 50mm f/1.8S DA DSM II vs Viltrox AF 85mm f/2.0 EVO

Both are Sony E mount primes for portrait and budget — 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	Yongnuo YN 50mm f/1.8S DA DSM II	Viltrox AF 85mm f/2.0 EVO
Focal length	50mm	85mm
Max aperture	f/1.8	f/2.0
Type	prime	prime
Coverage	APS-C	full-frame
Mount	Sony E	Sony E

Which should you buy?

the Yongnuo YN 50mm f/1.8S DA DSM II opens wider (f/1.8) — brighter in low light and more background blur
the Yongnuo YN 50mm f/1.8S DA DSM II (50mm) is wider — more in the frame for street and interiors; the Viltrox AF 85mm f/2.0 EVO (85mm) is tighter — more reach and compression for portraits
the Viltrox AF 85mm f/2.0 EVO covers full-frame (also works on APS-C bodies); the Yongnuo YN 50mm f/1.8S DA DSM II is APS-C-only — it won't fill a full-frame sensor

Where to buy

YONGNUO Upgraded YN50MM F1.8S DA DSM II Standard Prime Lens, Auto Focus F1.8 Large Aperture, APS-C Frame for Sony E-Moun

Yongnuo YN 50mm f/1.8S DA DSM IISee 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 Yongnuo YN 50mm f/1.8S DA DSM II and the Viltrox AF 85mm f/2.0 EVO?
The Yongnuo YN 50mm f/1.8S DA DSM II is 50mm f/1.8 prime, APS-C; 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 Yongnuo YN 50mm f/1.8S DA DSM II or the Viltrox AF 85mm f/2.0 EVO?
The Yongnuo YN 50mm f/1.8S DA DSM II — its f/1.8 maximum aperture lets in more light and gives more background blur than the f/2.0 of the other.

Do the Yongnuo YN 50mm f/1.8S DA DSM II 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). Note the Yongnuo YN 50mm f/1.8S DA DSM II is APS-C-only and won't fill a full-frame sensor.

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

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Yongnuo YN 50mm f/1.8S DA DSM IIAffiliate linkSee price on Amazon