10-07-2013 11:50 AM
Do you _only_ have the 70-200?
The 70-200 is a telephoto zoom... the "widest" it gets is still a telephoto focal length.
A "standard" zoom would provide a litttle wide-angle and a little telephoto -- and usually nothing too extreme in either direction. There are lots of options here. One of the nicer lenses is the EF-S 17-55mm f/2.8 IS USM specifically because it's an f/2.8 lens. There are also a number of variable focal ratio normal zooms -- the EF-S 15-85mm f/3.5-5.6 IS USM gets great reviews (I don't own one myself.)
But if you want wide angle and only wide angle, then the EF-S 10-22mm f/3.5-4.5 is probably the top choice.
A "normal" angle of view is an angle of view which approximates what your human eye can see just looking straight ahead (not moving your eye to look around). On a 7D body, a lens in the neighborhood of around 30-31mm will aproximate that angle of view. Anything much less than 30 will appear to be wide-angle. Anything much above will appear to be a bit zoomed in / telephoto.