I am debating on what type of lens to get. I want something mainly to be used for landscape shots and occasionally building. I do not need anything for very close up though. Would the Tokina AT-XAF124DXC 12-24mm Wide-Angle Lens do the job? Would it be fairly versatile or pretty limited in its use? Its $399.99 here Amazon.com: Tokina AT-XAF124DXC 12-24mm Wide-Angle Lens for Canon: Electronics Any other suggestions in this price range? I am VERY VERY new. I just ordered my first SLR and have not even received it yet, so I have not even started, please get me started on the right path. Thanks.