Sigma 12-24mm f/4 DG HS M | A £1400/$1600

Sigma goes to extr emely short lengths

The Mk II edition of Sigma’s 12-24mm has long been renowned for its whopping maximum viewing angle, equalling that of the 8-16mm lens in the DX camp. The ‘Art’ edition is a newer, more upmarket edition with a constant-aperture design. It’s considerably bigger and heavier, but is still only about the same weight as the Tamron 15-30mm and Nikon 14-24mm lenses.

Improvements over the Mk II edition include upgraded optics with an extra-large diameter aspherical element at the front and five FLD elements. Fluorine coatings are applied to the front and rear element, and the mounting plate gains a weather seal. As with both Tamron lenses on test, the lens is compatible with an optional USB docking station for firmware upgrades.

Performance

Autofocus speed is very fast, and noticeably quicker than the older Mk II lens. Sharpness is also rather better, especially towards the edges and corners of the image frame, and distortions are remarkably low. Overall performance is exceptional.