Canon makes a huge range of lenses and they are coming out with three more to coincide with the arrival of the two new dSLRs they have just announced (see my last post).
The three new lenses are the EF 14 mm F2.8 L II USM, the EF-S 18-55mm f/3.5-5.6 IS, and the EF-S 55-250mm f/4-5.6 IS.
But none of these is the one I would choose as my principal lens, at least not for a mid-telephoto zoom. I would choose a lens which is known to be sharp, has a constant aperture, and which also has image stabilization.
That lens is the Canon f4, 24-105mm ‘L’ series, .which retails at $1,000 more or less.