Viltrox AF 15mm f/1.7 Air vs Samyang AF 18mm f/2.8 FE

Both are Sony E mount primes for wide-angle and vlogging — 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	Viltrox AF 15mm f/1.7 Air	Samyang AF 18mm f/2.8 FE
Focal length	15mm	18mm
Max aperture	f/1.7	f/2.8
Type	prime	prime
Coverage	APS-C	full-frame
Mount	Sony E	Sony E

Which should you buy?

the Viltrox AF 15mm f/1.7 Air opens wider (f/1.7) — brighter in low light and more background blur
the Viltrox AF 15mm f/1.7 Air (15mm) is wider — more in the frame for street and interiors; the Samyang AF 18mm f/2.8 FE (18mm) is tighter — more reach and compression for portraits
the Samyang AF 18mm f/2.8 FE covers full-frame (also works on APS-C bodies); the Viltrox AF 15mm f/1.7 Air is APS-C-only — it won't fill a full-frame sensor

Where to buy

VILTROX 15mm f/1.7 E, AF 15mm F1.7 E Mount Lens for Sony E, APS-C Lens | AF 15/1.7 E Air Lens, Wide Angle Prime Lens for

Viltrox AF 15mm f/1.7 AirSee price on Amazon

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Samyang SYIO18AF AF 18mm F2.8 Full Frame Wide Angle Lens, Sony E | Wide-angle lens captures expansive landscapes, archit

Samyang AF 18mm f/2.8 FESee price on Amazon

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FAQ

What's the difference between the Viltrox AF 15mm f/1.7 Air and the Samyang AF 18mm f/2.8 FE?
The Viltrox AF 15mm f/1.7 Air is 15mm f/1.7 prime, APS-C; the Samyang AF 18mm f/2.8 FE is 18mm f/2.8 prime, full-frame. Both fit the Sony E mount.

Which is better in low light, the Viltrox AF 15mm f/1.7 Air or the Samyang AF 18mm f/2.8 FE?
The Viltrox AF 15mm f/1.7 Air — its f/1.7 maximum aperture lets in more light and gives more background blur than the f/2.8 of the other.

Do the Viltrox AF 15mm f/1.7 Air and Samyang AF 18mm f/2.8 FE 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 Viltrox AF 15mm f/1.7 Air 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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Viltrox AF 15mm f/1.7 AirAffiliate linkSee price on Amazon