With a constant f28 aperture throughout the zoom range and a 3 stop image stabiliser the canon ef s 17 55mm f28 is usm provides outstanding performance and framing flexibility in low light conditions this 17 55mm f28 is usm lens is for use with canon dslrs with a crop sensor aps c such as the canon 750d or 7d mk ii but is not suitable for full frame cameras such as the 5d mk iii or eos 6d