Thanks for that bird and Robby. If you're right (and I'd be surprised if you weren't
), it explains why no matter what I do, I'm rarely happy with my 640 images. Even when the 320's look good, I cant get a 640 image I'm really happy with. Hence the 352 option. Relatively good quality with respectable size with an acceptable frame rate. But hey isn't that what lifes about - compromise.
