If you have an eye toward making photography a big part of your life — and possibly being compensated for your work — this Sigma Photo 70-200mm f/2.8 telephoto zoom lens is one you're going to have to consider carefully early on. Talk about checking all the "I want" boxes — this lens features all the bells and whistles: a constant f/2.8 maximum aperture, Hyper-Sonic Motor, optical stabilization, EX-designated build quality, and compatibility with both full-frame and APS-C cameras. If your shooting situation places you at any distance from your subject, this is a lens that has the responsiveness and versatility to make you look like you're everywhere at once.
The f/2.8 aperture being available throughout the zoom range means this lens provides excellent performance in low-light situations, regardless of your focal length. Optical stabilization makes it possible to take sharp pictures, hand-held, with slower shutter speeds. HSM means your autofocus motor will perform silently and quickly, and of course EX build quality means you'll rely on this lens over and over again for years to come. Let's face it, if you were facing a situation where professional results were required, or even if you just expect them from yourself, wouldn't you want a lens with these characteristics in your gig bag? No wonder this lens is a favorite of working journalists, event photographers, and wedding pros worldwide.