The compact Tamron EF-S 17-50 mm f/2.8 is a standard zoom lens for Canon APS-C cameras. You can take documentary, architecture, and portrait photos with this lens. The lens offers a fixed aperture of f/2.8 over the entire zoom range from 17 to 50mm. This way, you have a light sensitive lens at your disposal with a beautiful bokeh at every aperture. Thanks to the XR and LD glass elements, chromatic aberrations are reduced and optical quality is improved. Multi-layer coatings prevent ghosting and flare in your photos.