Viltrox AF 40mm f/2.5 vs 7Artisans AF 27mm f/2.8 (APS-C)

Both are Sony E mount primes for everyday and compact — 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 40mm f/2.5	7Artisans AF 27mm f/2.8 (APS-C)
Focal length	40mm	27mm
Max aperture	f/2.5	f/2.8
Type	prime	prime
Coverage	full-frame	APS-C
Mount	Sony E	Sony E

Which should you buy?

the Viltrox AF 40mm f/2.5 opens wider (f/2.5) — brighter in low light and more background blur
the 7Artisans AF 27mm f/2.8 (APS-C) (27mm) is wider — more in the frame for street and interiors; the Viltrox AF 40mm f/2.5 (40mm) is tighter — more reach and compression for portraits
the Viltrox AF 40mm f/2.5 covers full-frame (also works on APS-C bodies); the 7Artisans AF 27mm f/2.8 (APS-C) is APS-C-only — it won't fill a full-frame sensor

Where to buy

VILTROX 40mm F2.5 FE Mount Lens, AF 40mm f2.5 E Full Frame Auto Focus Lens

Check the Viltrox AF 40mm f/2.5 price on Amazon →

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7artisans 27mm F2.8 AF STM APS-C Format Portrait Camera Lens for Sony E-Mount A7 A7R A7S A7II A7RII A7III A7RIII A9 A630

Check the 7Artisans AF 27mm f/2.8 (APS-C) price on Amazon →

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FAQ

What's the difference between the Viltrox AF 40mm f/2.5 and the 7Artisans AF 27mm f/2.8 (APS-C)?
The Viltrox AF 40mm f/2.5 is 40mm f/2.5 prime, full-frame; the 7Artisans AF 27mm f/2.8 (APS-C) is 27mm f/2.8 prime, APS-C. Both fit the Sony E mount.

Which is better in low light, the Viltrox AF 40mm f/2.5 or the 7Artisans AF 27mm f/2.8 (APS-C)?
The Viltrox AF 40mm f/2.5 — its f/2.5 maximum aperture lets in more light and gives more background blur than the f/2.8 of the other.

Do the Viltrox AF 40mm f/2.5 and 7Artisans AF 27mm f/2.8 (APS-C) 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 7Artisans AF 27mm f/2.8 (APS-C) 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 40mm f/2.5Affiliate linkAmazon →