I purchased a "new to me" Sigma 70-200 2.8 HSM lens for about $550.00....v.s. over $1800 for the Canon... yup, a deal I coudn't pass up.
Here's a few images that I took of my daugther Katherine...all of which were taken at ISO 100, f2.8, and approximately at 159mm....shutter speeds varied but they were high enough for a fast moving child :) It was snowing a little bit so, if you see white dots, that's snow and not dust! LOL



