Tamron AFF050S700

A tiny, fun ultra-wide with a neat close-focus trick, but the optics are bottom-tier. Only worth it if you find it cheap and size matters more than sharpness.

The close-focus trick is genuinely fun. An 11cm minimum focus distance on a 20mm lens lets you shove the front element practically into your subject and still nail focus, which opens up some creative compositions you just can't get with most ultra-wides. But the sharpness story is rough. Optical quality lands in the 19th percentile, which means most lenses in our database resolve more detail. The f/2.8 aperture is fine but not exciting, and autofocus is dead average. No stabilization either, so on a body without IBIS you'll want to keep shutter speeds up.

The Sigma 18-50mm f/2.8 DC DN is the obvious alternative if you want more flexibility. You lose the 20mm prime's tiny size but gain a zoom range that covers everything from wide to portrait, and Sigma's optical quality is consistently stronger. The Sony E 18-135mm f/3.5-5.6 OSS is another option if you want stabilization and reach, though it's slower and bulkier. If you're dead set on a prime, the Meike 85mm f/1.4 II is a completely different focal length but shows what you can get optically for similar money. The Tamron's only real advantage is size and the close-focus trick.

Pricing is all over the place in Europe. We're seeing EUR 351 to EUR 787 across German, French, and Italian listings, which is a wild spread for the same lens. At the low end, this is a reasonable impulse buy for Sony E shooters who want a tiny ultra-wide. At the high end, you're getting fleeced. Shop around and don't pay more than the mid-300s in EUR. The budget score of 45.6/100 reflects that this lens only makes sense when you find it cheap.

The Tamron 20mm f/2.8 Di III OSD is the lens you grab when you want ultra-wide shots without hauling a brick around. At 220g, it's stupid light, and the 1:2 macro capability means you can get weirdly close to stuff. But don't let the compact size fool you into thinking this is a premium optic. Our database puts its optical performance in the bottom fifth of lenses we've tested, so there's a real trade-off happening here.

If you care about sharpness, skip this. The optical performance is in the bottom fifth of our database, and you'll notice it in any shot where detail matters. Go get the Sigma 18-50mm f/2.8 DC DN instead. It's bigger, but the image quality is in a different league and the zoom range is far more useful. If you need stabilization, the Sony E 18-135mm OSS is the better call.

Buy it if you find it under EUR 400 and you specifically want the smallest possible ultra-wide for a Sony E body. The 1:2 macro is a fun bonus that makes this lens more interesting than the specs suggest. But if image quality is your priority, look elsewhere. The optical performance is simply not competitive with what Sigma and Sony offer at similar prices, and the lack of stabilization hurts for handheld video and low-light work.