Went to a local 10k race on Sunday, with a borrowed 70-300mm lens. I've been thinking about buying something similar for my wedding work, but this one is about £450 on the web. It seems to be nice and sharp (softness in these images is a combination of bad focussing on my part, and the processing that the images went through. Plus I was shooting in jpeg, which I will never do again, even if time is limited), and the image stabilisation works really well. The copy I had had obviously been dropped or banged at some point, because the USM motor was whirring like a bastard.
Anyway, here are some 'portraits' that I took for fun.