No, the lens mount is completely different.
yes all Canon cameras are compatible via lenses to each other
The short answer is: "None" See the answer for the question: Are canon t70 and canon eos rebel xsi lense compatible? The Canon AE1 takes FD mount lenses. All Canon digital cameras take EF lenses. They are not compatible.
Canon is a global printer, camera and technology company. Lenses for the cameras that Canon supply can be ordered from Canon directly via the Canon website.
There are many different lenses for cameras; Wide angle lenses, standard lenses, portrait lenses, telephoto lenses and more. Canon has its own brand of lenses but also Sigma y Tamron are offering compatible lenses for it, it just depends on the price and the quality you are looking for
The short answer is "Depends" The long answer is: From 1971 to 1987, Canon SLR bodies and lenses used the Canon FD mount. In 1987, Canon introuduced the EOS SLR system. All EOS cameras use Canon EF (auto focus) lenses. They can also use independently made lenses with EOS type camera mounts. Canon FD and EF lenses have completely different mounting connections and are not compatible with each other's camera bodies. All Canon DSLR (digital single lens reflex) cameras can use all Canon EF (or independent manufacturer equivalent) lenses made for film or digital cameras. Most Canon DSLR's have an APS-C sensor that measures 22.2 x 14.8mm. (This is smaller than the 36 x 24mm image size on 35mm film.) In 2003, Canon introduced EF-S lenses that were optimized for the APS-C sensor size. The EF-S lenses will only fit on Canon 20D, 30D, 40D, and 50D cameras (as of 2008) and all Canon Digital Rebel cameras.
All Canon Rebel DSLR cameras uses EF lenses that fit the Canon EF Mount.
Canon telephoto lenses are lenses for cameras. These lenses allow one to get a closer view of subjects which are normally difficult to get close to, such as wildlife.
nope
Lenses for Canon brand cameras can be purchased from the official Canon website. Alternatively, one can also find the proper lenses on Amazon or eBay.
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.)
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?
All EF series lenses will work with the film Rebel or any other EOS film body. EF-S lenses are not compatible with film cameras or full-frame digitals.