EF 90-300mm f/4.5-5.6 EF-S 18-55mm f/3.5-5.6 IS EF 100-300mm f/5.6 EF 28-70mm f/3.5-4.5 II EF 28-80mm f/2.8 4L USM To zoom turn the lens' zoom ring. The Focal Lengths on the Canon EF-S 18-55mm f/3.5-5.6 IS II kit lens The numbers 18-55mm on a lens are the focal lengths and view angle a lens can shoot. The wide end (18mm) typically includes a larger viewing angle (more of the environment details) while the longer end (55mm) is similar to the field of view of what humans normally would see So, I've been looking at the following: - EF-S 17-55mm f/2.8 IS - EF 24-70mm f/2.8 L . I'd envisage bringing both the 10-22mm and whichever new lens I buy on my trips, so the longer range of the 24-70mm and the fact that it doesn't overlap makes it seem ideal, but the IS on the 17-55mm is appealing. The Canon 18-55mm ƒ/3.5-5.6 IS STM lens takes 58mm filters and is available now for around $200; the EW63-C lens hood is an optional extra. The sharpness performance improves as you zoom out FTfIbr.