A Canon EF-S lens ranges from $200 to close to $800. The price will depend on the size of the lens and the model, since there are many models in the EF-S group.
All canon EF and EFS lenses fit on all canon dslr's
EF and EF-S lenses can be used on 400d. There is a lot of lenses out there.
All Canon Rebel DSLR cameras uses EF lenses that fit the Canon EF Mount.
All lenses that have a "ef" or "ef-s" mount can work on a canon 50d. Be mindful, if you decide to go with a fill frame camera later on, the "ef-s" lenses will create heavy vignetting on those cameras?
Yes. The camera can use EF and EF-S lenses.
Yep.
Any canon ef or efs lenses will fit on all of canon's dslr
If you're buying Canon lenses, you'll need the EF-Slenses for your 1100d.
All Canon Rebels can use either Canon EF (or compatible) or Canon EF-S lenses. EF lenses can be used on any Canon EOS camera. EF-S lenses, introduced in 2003, are made specifically for Canon EOS cameras with APS-C size (22.2 x 14.8mm) sensor. They can be used only on Canon Rebel cameras and on the Canon 20D, 30D, 40D, and 50D cameras (as of 2008). No other manufactuer currently makes camera bodies that take EF lenses. (Several years ago, Kodak had a full-frame digital camera that took EF lenses. It was a camera that was OK in the studio, but inferior for general photographic use. It was discontinued shortly after introduction.)
The Canon EOS Rebel, Rebel XT, and XTi are EF-S mount. They will accept EF-S and EF mount lenses.
Canon makes many popular cameras. Canon manufactures telephoto lenses such as the EF 300mm f/4L and the EF 400mm f/5.6L. Check out stores such as Amazon for more models.
Any EF or EF-S lens will work with both the Canon 500D and 550D. So yes.