I run a sight in weekend at my club. A lot of guys can't shoot so they will ask me to fire their rifles, so I get to look threw a lot of scopes and it is amazing how many are completely out of focus. They owner tells me it is clear for them. I ask if they mind if I focus it and then hand it back to them. The usual response is "Wow, I didn't lnow it was supposed to look like that!"