Tamron had quite a run in recent years with rapid releases of new lenses for mirrorless systems. Obviously, they must have been doing something right because their revenue even exceeded competitor Sigma recently. It's worth noting that Sony has a 15% stake in the company.

Thanks to Tamron USA for sending me an early loaner of the lens. As always, this is a completely independent review. I used both my

An ultrawide zoom for Fuji and Sony APS-C cameras

• +

  Excellent optics, Sturdy build, Dust, splash, and fluorine protection, Wide angle of view, F2.8 aperture

• -

  Omits stabilization, Shows some focus breathing

No two ways about it, this is an extraordinary lens. Its performance is superb, it is far lighter than it could be expected to be, it has weather sealing and the price is realistic. An ideal travel companion, with the bonus of that fast, bright f/2.8 aperture.

• +

  Outstanding sharpness, Low distortion at mid focal lengths, Low flare, Well-controlled CA, Virtually silent, fast AF, Light, Weather sealing, Matches 17-70mm, Modest vignetting