Canon - EF-S 17-55mm f/2.8 IS USM
The EF-S 17-55mm f/2.8 IS USM Lens from Canon is a large-aperture lens compatible with APS-C format digital SLR cameras, and offers a versatile wide-angle to short telephoto zoom range. The focal length is equivalent to approximately 27-88mm in 35mm format and its constant f/2.8 maximum aperture is effective in low light throughout the zoom range. A wide maximum aperture also enables shallow depth of field control.
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