If I were you I would only start buying lenses when the current lenses I have could not give me the outcome that I want. My first lens was the 18-55mm F/3.5-5.6 IS. I still have it now. When it could not give me a satisfactory shallow depth of field or background blur I bought the 50mm f/1.8 II. When the 18-55 cannot get me objects far away, I bought the 55-250mm F/4-5.6 IS telephoto zoom. And when it could not get wide enough, I bought the EFs 10-22mm USM. It all depends on your needs.
Are u buying for the reason of owning another lens?
You have to help us help u by sharing with us what do u intend to use it for?
Do u need fast prime for low light coverage? A dedicated lens for portraiture etc?
Is ur current lens restricting u in any way?
Since u asked, most prob is you dun need another lens.
Lenses canon users must have, for what reason? hmm.. evades my logic.
I see some suited portraits, some wide angles, and some for macros. What if he only shoot wide angles? wouldn't it be wasted to get say 50mm f1.2?
I think everyone scared him away...
And he will be bad mouthing about Clubsnap not friendly. :bsmilie:
To TS, i think best is to play around with your kit lens and the 50D 1st. Next month when you try out and you have figure out what you love to shoot, come back and tell all of us. We would glad to help you to recommed on which lens is next.
Btw, 50D is semi pro right? So you need to try and catch up with the Semi Pro level. Get to know the body well like how you know yourself. Read manual and read books on digital photography. Don't buy buy buy but end up you does not invest your time to have skills, its useless. ;p