TTArtisan AF 27mm f/2.8 E vs Tamron 20mm f/2.8 Di III OSD M1:2

Both are Sony E mount primes for compact 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	TTArtisan AF 27mm f/2.8 E	Tamron 20mm f/2.8 Di III OSD M1:2
Focal length	27mm	20mm
Max aperture	f/2.8	f/2.8
Type	prime	prime
Coverage	APS-C	full-frame
Mount	Sony E	Sony E

Which should you buy?

the Tamron 20mm f/2.8 Di III OSD M1:2 (20mm) is wider — more in the frame for street and interiors; the TTArtisan AF 27mm f/2.8 E (27mm) is tighter — more reach and compression for portraits
the Tamron 20mm f/2.8 Di III OSD M1:2 covers full-frame (also works on APS-C bodies); the TTArtisan AF 27mm f/2.8 E is APS-C-only — it won't fill a full-frame sensor

Where to buy

TTArtisan AF 27mm F2.8 Auto Focus Lens Mirrorless Cameras Lens Compatible with for Sony E-Mount A5000 A5100 A6000 A6100

TTArtisan AF 27mm f/2.8 ESee price on Amazon Amazon has no new-stock listing for this one right now — this button runs an Amazon search for it rather than opening a product page.

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Tamron 20mm f/2.8 Di III OSD M1:2 Lens for Sony Full Frame/APS-C E-Mount | 20mm f/2.8 lens with 1:2 magnification and OS

Tamron 20mm f/2.8 Di III OSD M1:2See price on Amazon

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FAQ

What's the difference between the TTArtisan AF 27mm f/2.8 E and the Tamron 20mm f/2.8 Di III OSD M1:2?
The TTArtisan AF 27mm f/2.8 E is 27mm f/2.8 prime, APS-C; the Tamron 20mm f/2.8 Di III OSD M1:2 is 20mm f/2.8 prime, full-frame. Both fit the Sony E mount.

Do the TTArtisan AF 27mm f/2.8 E and Tamron 20mm f/2.8 Di III OSD M1:2 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 TTArtisan AF 27mm f/2.8 E 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:

More Sony E comparisons: Sigma 14-24mm f/2.8 DG DN Art vs Sony FE 16-35mm f/2.8 GM II · Sony FE 24-70mm f/2.8 GM II vs Tamron 17-70mm f/2.8 Di III-A VC RXD · TTArtisan AF 27mm f/2.8 E vs Samyang AF 35mm f/2.8 FE · TTArtisan AF 56mm f/1.8 E vs Sony E 50mm f/1.8 OSS · all Sony E lenses · all comparisons

Tamron 20mm f/2.8 Di III OSD M1:2Affiliate linkSee price on Amazon