With a constant f/2.8 aperture throughout the zoom range and a 3-stop Image Stabilizer, the EF-S 17-55mm f/2.8 IS USM provides outstanding performance and framing flexibility in low light conditions.
To extend focal length of Canon L-series telephoto or telephoto zoom lens by 2x
The Lensbaby Composer Pro (EF Mount) provides the same spectacular imagery as the Lensbaby Muse yet with further enhancements to help you achieve the best effects possible
Canon zoom lens
Canon macro lens
Canon telephoto zoom lens
2.8L USM EOS mount 35mm SLR Zoom lens