Does the TTArtisan AF 27mm f/2.8 E fit the Sony a7 III?

Yes, it mounts — both are Sony E. But the TTArtisan AF 27mm f/2.8 E is an APS-C lens on a full-frame Sony a7 III, so the body uses only the centre of its sensor (crop mode, lower resolution). The 27mm then frames like 41mm.

Last verified 2026-06-21 · Sony E mount · TTArtisan APS-C lens · Sony full-frame body · 1.5× crop applied

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

Check the TTArtisan AF 27mm f/2.8 E price on Amazon →

What the TTArtisan AF 27mm f/2.8 E gives you on the Sony a7 III

Field of view: 27mm — frames like 41mm on this body (1.5× crop)
Maximum aperture: f/2.8
Type: prime
Where it lands: standard on the Sony a7 III (35–59mm equivalent) — 47 of the 103 Sony E lenses reach this range here, the brightest being the Laowa Argus 35mm f/0.95 FF at f/0.95
Tagged for: Standard prime Compact Budget Street

What "crop mode" means here

The TTArtisan AF 27mm f/2.8 E is designed to cover an APS-C sensor, and the Sony a7 III has a full-frame one. The lens mounts and works, but the body reads only the centre of its sensor to match the lens — a lower-resolution file than the Sony a7 III produces with a full-frame lens. Framing follows the crop: 27mm looks like 41mm.

If you want the Sony a7 III's full resolution, use a full-frame Sony E lens instead — all 76 of them are listed here.

Other Sony E lenses that use the Sony a7 III's full-frame sensor

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Focal	Lens	Buy	Max aperture	Type	Coverage	Best for
40mm	Sony FE 40mm f/2.5 G	Amazon →	f/2.5	prime	Full-frame	Street Everyday Standard prime Travel
40mm	Viltrox AF 40mm f/2.5	Amazon →	f/2.5	prime	Full-frame	Everyday Compact Street
40mm	Voigtländer Nokton 40mm f/1.2 E	Amazon →	f/1.2	prime	Full-frame	Standard prime Low-light Street
40mm	Zeiss Batis 40mm f/2 CF	Amazon →	f/2	prime	Full-frame	Standard prime Everyday Street
45mm	Samyang AF 45mm f/1.8 FE	Amazon →	f/1.8	prime	Full-frame	Standard prime Everyday Compact Travel
35mm	Sigma 35mm f/1.4 DG DN Art	Amazon →	f/1.4	prime	Full-frame	Street Low-light Wedding & event
35mm	Sony FE 35mm f/1.4 GM	Amazon →	f/1.4	prime	Full-frame	Street Everyday Low-light Wedding & event
35mm	Sony FE 35mm f/1.8	Amazon →	f/1.8	prime	Full-frame	Street Everyday Low-light

All 103 Sony E lenses fit the Sony a7 III; 76 of them use its full-frame sensor at full resolution — check any lens against this body · best lenses for the Sony a7 III

Nearby lenses on the Sony a7 III

Sony FE 40mm f/2.5 G Viltrox AF 40mm f/2.5 Voigtländer Nokton 40mm f/1.2 E Zeiss Batis 40mm f/2 CF Sigma 30mm f/1.4 DC DN Contemporary Samyang AF 45mm f/1.8 FE

FAQ

Does the TTArtisan AF 27mm f/2.8 E fit the Sony a7 III?
Yes. The TTArtisan AF 27mm f/2.8 E is a Sony E lens and the Sony a7 III is a Sony E body, so it mounts. Because the lens is APS-C and the body is full-frame, the Sony a7 III switches to crop mode and uses only the centre of its sensor, producing a lower-resolution file.

Will autofocus work?
We do not publish autofocus behaviour — FitMyLens stores only the specs that are fixed facts of the product (mount, focal length, maximum aperture, sensor coverage). Check the TTArtisan product page for AF support on the Sony a7 III.

What focal length will I actually get?
41mm equivalent. In crop mode the Sony a7 III reads an APS-C-sized area, so the 27mm frames like a 1.5× longer lens.

Citing these specs? Go ahead — manufacturer data, last verified 2026-06-21. Copy a ready-made reference:

More: TTArtisan AF 27mm f/2.8 E specs · Every lens on the Sony a7 III · Best lenses for the Sony a7 III · All Sony E lenses · All cameras