Hey Heather,
You called it, on the second cat pict. Looks like motion blur.
The first shot looks good. Lots of detail, and the eye looks like the focus point. I applied a little smart sharpen (87% @ .6 pixels), and it looks very sharp around the eye. So, I don't see a problem with that shot. How sharp is your 50 1.8 at f/1.8?
The shot of you looks good too. Plenty sharp and detailed, I'd need a 100% crop to tell for sure. At f/8 looks like everything is in focus, so can't judge the focus accuracy on this shot anyway.
If you search on 40d and sharp, you'll find a handful of threads. Apparently the 40d has a pretty heavy AA filter, and requires a bit more sharpening than other bodies. Nothing I ever noticed, because I generally don't pay attention to the numbers when I sharpen. I always sharpen to taste, and have no idea if it took more sharpening than my XTi or 1d.
Here's the 1st Cat pic, with the sharpening I mentioned.
Edit: Just noticed this was ISO 800 as well. Wow, that's plenty sharp. I had no idea the 50 1.8 was that sharp, wide open. My 50 1.4 certainly isn't.
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