Does the Sigma 28-45mm f/1.8 DG DN Art fit the Sony a7 III?

Yes. The Sigma 28-45mm f/1.8 DG DN Art is a Sony E lens and the Sony a7 III is a Sony E body, so it mounts natively. Both are full-frame, so 28-45mm is the true field of view — no crop factor.

Last verified 2026-06-21 · Sony E mount · Sigma full-frame lens · Sony full-frame body

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What the Sigma 28-45mm f/1.8 DG DN Art gives you on the Sony a7 III

Field of view: 28-45mm (true full-frame field of view)
Maximum aperture: f/1.8
Type: zoom (28-45mm)
Where it lands: wide on the Sony a7 III (24–34mm equivalent) — 31 of the 103 Sony E lenses reach this range here, the brightest being the Sigma 16mm f/1.4 DC DN Contemporary at f/1.4
Tagged for: Pro standard zoom Low-light Everyday

Anything to watch for?

No. The Sigma 28-45mm f/1.8 DG DN Art and the Sony a7 III are both Sony E full-frame, which is the fully native pairing — the lens covers the whole sensor and the marked 28-45mm is the field of view you get.

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
28-70mm	Sony FE 28-70mm f/2 GM	Amazon →	f/2	zoom	Full-frame	Pro standard zoom Wedding & event Low-light Everyday
28-75mm	Tamron 28-75mm f/2.8 Di III VXD G2	Amazon →	f/2.8	zoom	Full-frame	Pro standard zoom Everyday Budget pro
28-75mm	Viltrox AF 28-75mm f/2.8	Amazon →	f/2.8	zoom	Full-frame	Standard prime Everyday Pro standard zoom
28mm	Viltrox AF 28mm f/1.8	Amazon →	f/1.8	prime	Full-frame	Street Everyday
25mm	Zeiss Batis 25mm f/2	Amazon →	f/2	prime	Full-frame	Wide-angle Landscape Astrophotography
24-70mm	Sigma 24-70mm f/2.8 DG DN II Art	Amazon →	f/2.8	zoom	Full-frame	Pro standard zoom Everyday Budget pro
24mm	Sigma 24mm f/1.4 DG DN Art	Amazon →	f/1.4	prime	Full-frame	Wide-angle Astrophotography Street Low-light
24-105mm	Sony FE 24-105mm f/4 G OSS	Amazon →	f/4	zoom	Full-frame	Everyday Travel Wedding & event

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 28-70mm f/2 GM Tamron 28-75mm f/2.8 Di III VXD G2 Viltrox AF 28-75mm f/2.8 Viltrox AF 28mm f/1.8 Sigma 18-50mm f/2.8 DC DN Contemporary Tamron 17-70mm f/2.8 Di III-A VC RXD

FAQ

Does the Sigma 28-45mm f/1.8 DG DN Art fit the Sony a7 III?
Yes. The Sigma 28-45mm f/1.8 DG DN Art is a Sony E lens and the Sony a7 III is a Sony E body. Lens-to-body compatibility is decided by the mount, so it fits natively.

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 Sigma product page for AF support on the Sony a7 III.

What focal length will I actually get?
28-45mm. The Sony a7 III is full-frame and the Sigma 28-45mm f/1.8 DG DN Art is a full-frame lens, so the marked focal length is the field of view you get.

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

More: Sigma 28-45mm f/1.8 DG DN Art specs · Every lens on the Sony a7 III · Best lenses for the Sony a7 III · All Sony E lenses · All cameras