I decided to buy the Canon XTI SLR but I need help with what kind of lens should I Buy for it?

consider on the Canon EF 28-200 lens which that’s my all around lens that I’ve been using.

Get the XTI kit with the kit lens, that’s an 18-55 lens and will serve you well enough for mountain outdoor photos- just be sure to stop the lens down to about f/8 or f/11, that’s the sweet spot for sharpness with that lens. Then, in addition, get either the 50mm f/1.8 ($ 80) or 85mm f/1.8 ($ 340) for portraits of people. Prime lenses are great for portraits albeit less flexible than a zoom. Either of those two primes can do double duty as low light lenses as well.

The kit lens is a great start. It’s not the best lens in the world but it’s surprisingly good once you set the lens on f8-9 – perfect for outdoor and panoramic shoots because it’s bright outside anyway and its wide angle is pretty useful.

I too have the 28-200 USM and find it very useful, but I still use the kit lens from time to time.

I also have a 50mm f1.8 prime lens – cheap but good. This one is great for portraits – big aperture and very sharp. Construction quality is a little bit doubtful because it’s made of plastic but for $ 70 or so this is pretty much a bargain.

A couple of months ago I got a Canon XTI with a Tamron 18-250 (35 equiv. 28-400) f/3.5 Macro zoom, it is an awesome zoom that covers just about every thing for a one lens does all, for my Portrait work I use a Canon EF 50 f/1.4 (35 Equiv. 80).

The Tamron is about $ 500 and The Canon is about $ 310, try http://www.bhphotovideo.com Great prices, Professional staff, demos and reviews. I have been a happy customer for more then 25 years now and last of all, they also offer NEW and USED equipment.