Zoom Camera Lens

Ive been looking around for a zoom lens for my canon rebel xti. I dont know much about lenses but why is the price of the
EF-S 18-200mm f/3.5-5.6 IS cheaper than
EF 24-70mm f/2.8L USM ? or even EF-S 17-85MM f4-5.6 IS USM?

Is a Tamron 70-300mm f/4-5.6 Di Zoom lens compatible with Canon Rebel XTI SLR

I am new to Digital Slrs and am looking to get a zoom lens..I own a canon rebel eos xt. I have been looking around on ebay and am not sure what would work w/ my camera.

I got the stock lens that it comes with but im not happy witht he quality. What lens would you get for the canon Rebel xti?
Which would you choose?
EF 75-300 mm f/4-5.6 III USM Telephoto Zoom Lens
EF 28-135 mm f/3.5-5.6 IS USM Standard Zoom Lens
I want to be able to take [...]

I am interested in a lens for my Canon Rebel XT. I broke the Kit lens and am now looking for a zoom lens that is pretty versatile. I would like something with a compact build, a quick auto focus, and good for portraits as well as travel photography. Any ideas?

i currently have a Canon Rebel XTI camera, i am interested in becoming a photographer. i am looking for a telescopic lens or telescopic zoom lens but dont know what to buy. i am try to zoom in at stuff like a boat on the ocean or wild life. can ayone help me.

i currently have a Canon Rebel XTI camera, i am interested in becoming a photographer. i am looking for a telescopic lens or telescopic zoom lens but dont know what to buy. i am try to zoom in at stuff like a boat on the ocean or wild life. can ayone help me.

I tend to like the prime lenses. I have the stock kit lens that came with my Canon Rebel XTI & 50mm f/1.8 prime. Do I really need another zoom?
I really want the Canon EF 85mm f/1.8 USM Lens but also thinking maybe getting the Canon EF 28-135mm f/3.5-5.6 IS USM Lens or the [...]

I have a fantastic Sigma 100-300mm zoom lens. I used it on my old (non-digital) Pentax SLR. I am looking to buy a new dSLR, and I’d like to get the Canon Rebel XS; however, if my Sigma lens won’t work on it, I won’t get it. Does Sigma work on all [...]

Hello. I’ve got a Canon Rebel EOS 300D camera. Will a CANON ZOOM LENS EF 70-210mm work with my camera. I’ve done some checking, and I’m pretty sure it will… also, SHOULD I buy it (less than 0). I read a couple of photographers reviews, and it looks ok (although it is 20 years old) [...]