Sigma's second lens for the Canon RF mount is here, and it's one that APS-C shooters have been patiently waiting for: the Sigma 10-18mm f/2.8 DC DN | Contemporary.
Announced back in October for Sony E, Fujifilm X and L-Mount, the 10-18mm f/2.8 is "the world's smallest and lightest ultra-wide-angle zoom lens for APS-C cameras" – and is the perfect complement to Sigma's first Canon RF lens, the Sigma 18-50mm f/2.8 DC DN Contemporary.
With an equivalent focal range of 16-28.8mm in full frame terms, and a constant f/2.8 aperture throughout the zoom range, the lens fills a much-needed gap for Canon EOS R7, R10, R50 and R100 owners, essentially providing a wide-angle trinity pro lens for APS-C cameras.
The lens retains the same core technical specs as seen on the other mounts, with 13 elements in 10 groups, 7 aperture blades, a minimum focus distance of 11.6cm at the wide end and 19.1cm at the telephoto, weather sealing, a filter thread of 67mm and a length of just 62mm.
It is, however, slightly heavier at 270g (rather than 260g on other mounts), and has a slightly different angle of view range of 106.6° - 73.4°.
While the components may be the same, Sigma has customized the software to meet Canon's autofocus and speed performance.
"A control algorithm including AF drive and communication speed optimization has been developed specifically for Canon RF Mount interchangeable lenses," says Sigma.
"In addition to realizing high-speed AF, the lens also supports Servo AF and in-camera aberration correction" on cameras that feature the latter function.
The Sigma 10-18mm f/2.8 DC DN | Contemporary for Canon RF goes on sale September 26 with a retail price of $659/£649 (Australian pricing to be confirmed).
You might be interested in the best Canon RF lenses, along with the best wide-angle lenses and the best Canon wide-angle zoom lenses.
