18-35mm

The Sigma 18-35mm f/1.8 DC HSM Art lens is a fast, constant-aperture wide standard zoom lens made by Sigma Corporation. It was announced April 18, 2013.
This lens, at its time of manufacturing, was considered a game changer due to it being the only standard zoom boasting a constant f/1.8 aperture. The lens was designed specifically for crop body DSLRs enabling a crop factor adjusted (full frame equivalent) of f/2.88 for canon or f/2.7 for Nikon crop body DSLRs across an equivalent range of 28mm-56mm (Canon full frame adjusted) or 27mm-53mm (Nikon full frame adjusted).
In the year of its introduction, the lens won an EXC!TE award and was named Lens of the Year at the Camera Grand Prix.

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