Sigma 18-35mm f/1.8 Lens – World's First Constant f/1.8 Zoom Lens

Sigma surprised the world by releasing the first constant f/1.8 zoom lens, the Sigma 18-35mm F1.8 DC HSM Art lens.
Sigma18-32mm
The Sigma 18-35mm f/1.8 lens is a wide aperture zoom created for DSLR cameras with APS-C size sensors. On a 1.6 crop sensor it’ll be the equivalent of a 28.8-56mm f/1.8 lens. The focal length makes the lens perfect for landscapes, portraits, wedding, studio, close-up and street photography.
A fixed f/1.8 aperture on a zoom lens is something unheard of. Most zoom lens from Canon and Nikon has a fixed aperture of f/2.8. This new Sigma lens offer more than a stop of extra light. I think it will be great for achieving bokeh effect while at the same time still offer some zoom capability.
The Sigma 18-35mm f/1.8 will be available in Canon, Nikon and Sigma mounts. No news on the price or availability date. Personally, I’m hoping that it won’t be too expensive. This would be a good lens to have in the bag.

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