Sony E 18-200mm f/3.5-6.3 OSS vs Tamron 28-200mm f/2.8-5.6 Di III RXD

Both are Sony E mount zooms for travel and everyday — 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	Sony E 18-200mm f/3.5-6.3 OSS	Tamron 28-200mm f/2.8-5.6 Di III RXD
Focal length	18-200mm	28-200mm
Max aperture	f/3.5-6.3	f/2.8-5.6
Type	zoom	zoom
Coverage	APS-C	full-frame
Mount	Sony E	Sony E

Which should you buy?

the Tamron 28-200mm f/2.8-5.6 Di III RXD opens wider (f/2.8-5.6) — brighter in low light and more background blur
the Sony E 18-200mm f/3.5-6.3 OSS covers 18-200mm and the Tamron 28-200mm f/2.8-5.6 Di III RXD covers 28-200mm — pick the range that matches what you shoot
the Tamron 28-200mm f/2.8-5.6 Di III RXD covers full-frame (also works on APS-C bodies); the Sony E 18-200mm f/3.5-6.3 OSS is APS-C-only — it won't fill a full-frame sensor
the Sony E 18-200mm f/3.5-6.3 OSS is first-party (Sony) for guaranteed full autofocus and in-camera corrections; the Tamron 28-200mm f/2.8-5.6 Di III RXD is third-party — usually the value pick

Where to buy

Sony Alpha SEL18200 E-Mount 18-200mm F3.5-6.3 OSS Lens (Silver)

Sony E 18-200mm f/3.5-6.3 OSSSee 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 28-200mm F/2.8-5.6 Di III RXD for Sony E-Mount, A071SF

Tamron 28-200mm f/2.8-5.6 Di III RXDSee price on Amazon

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FAQ

What's the difference between the Sony E 18-200mm f/3.5-6.3 OSS and the Tamron 28-200mm f/2.8-5.6 Di III RXD?
The Sony E 18-200mm f/3.5-6.3 OSS is 18-200mm f/3.5-6.3 zoom, APS-C; the Tamron 28-200mm f/2.8-5.6 Di III RXD is 28-200mm f/2.8-5.6 zoom, full-frame. Both fit the Sony E mount.

Which is better in low light, the Sony E 18-200mm f/3.5-6.3 OSS or the Tamron 28-200mm f/2.8-5.6 Di III RXD?
The Tamron 28-200mm f/2.8-5.6 Di III RXD — its f/2.8-5.6 maximum aperture lets in more light and gives more background blur than the f/3.5-6.3 of the other.

Do the Sony E 18-200mm f/3.5-6.3 OSS and Tamron 28-200mm f/2.8-5.6 Di III RXD 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 Sony E 18-200mm f/3.5-6.3 OSS 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: Sony FE 24-50mm f/2.8 G vs Sony FE 28-60mm f/4-5.6 · Sigma 14-24mm f/2.8 DG DN Art vs Sony FE 16-35mm f/2.8 GM II · Sony Sonnar T* E 24mm f/1.8 ZA vs Sony FE 28mm f/2 · Sony E 50mm f/1.8 OSS vs Meike AF 55mm f/1.4 (APS-C) · all Sony E lenses · all comparisons

Tamron 28-200mm f/2.8-5.6 Di III RXDAffiliate linkSee price on Amazon