Quote Originally Posted by BMbikerider View Post
If you go right back in time to when the Vietnam War was on, there was a story about the Nikon 24mm and 50mm being designed to have a noticeably sharper centre than the edges so as to concentrate the eye on the important bits. This is only a story told possibly many times so I don't know if it has any truth in it
I thought due to the laws of physics lenses couldn't be sharper at the edge than in the centre.