Sun C-A-D 70-210mm f/3.5-4.5

The 70-200 option nobody considers, but they reall should I'm very picky about lens sharpness and usually use only primes. However, I wanted something that would reach out to telephoto ranges for certain types of landscape shots, without breaking the bank or compromising on image quality. This lens is a hidden gem in the EF lineup. It is not as sharp as L glass, but stop down to f/5.6 or f/6.3 and it might as well be. Even wide open it's great in the center (corners fall off in sharpness predictably). Killer lens for the price especially.

great for 6D I got this to go with my 6D. Its a very old lens, so old there is not even a lens profile available for it to correct for aberrations such as purple fringing or dark corners. However, it produces a sharp image with good colors. I have taken a few portraits with it and my daughter at gymnastics and the results were great. Worked well with my crop 60D as well. Its about a stop faster that the usual low-end zooms out there, so that helps a bit indoors as well.

Nice feel, doesn't seem cheaply-made like some newer Canon lenses Images seem sharp, and it has a much nicer feel than the 18-55 mm zoom that came with the camera, especially when manual focusing.