Sigma 18-35mm f/1.8 DC HSM A

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 appertute. The lens was designed specically 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).

Sigma 18-35mm f/1.8 DC HSM A

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 appertute. The lens was designed specically 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).