Here's a 100% crop of some red-ears from the park, 432mm equivelent, handheld. some PP, but only the standard stuff for this camera (add 7 or 8 points of contrast, minus 4 or 5 points brightness, very slight NR if needed, USM.) It's no tripod mounted prime 2.8 with a $5000 price tag, but it takes pretty nice pictures none the less.
Erik.