Tamron 10-24mm

[Ralpheyesight]

Davids comment about the new Tamron 10-24mm not being recommended can you expand please.

[David Kilpatrick]

It's very unsharp wide open towards the edge of the field at moderatel close distances and 10mm, it has poor geometry compared to the 11-18mm or the 10-20mm Sigma, and the overall sharpness of the lens (at any aperture, focal length, and disance) doesn't match up to the less ambitious earlier designs.

Simple as that - they made a lens with a faster maximum aperture and the wider zoom range, and it turns out to be optically inferior to the more conservative earlier design/s. I guess that the earlier models will cease to be available, and the Tamron 10-24 will be the only new choice by next year (plus the new Sigma with similar enhancements, which may turn out to be better). But right now the Sony 11-18mm or Tamron 11-18mm (or old KM 11-18mm version) all remain a better buy for clean, sharp w/a zoom results.

David

[Ralpheyesight]

Thanks for the detailed info David I now know where to look.