True at 10x mag..
The ret has half mildot marks on it, so you also have the option of turning the mag down to 5x and then use the half mildot marks as full mildots. Don't know if I've explained that very well ?
Very handy for close range ratting work. i.e. for bunny bashing use the scope on 10x mag and figure out all your holdovers to the nearest 1/2 mildot. Then for the close range stuff where you need a bigger field of view turn the mag down to 5x and use the half marks as full mildots.
I've recently fitted the 4-16x50 on my hunting rifle and I've got to say that so far I'm very impressed. As a hunting scope it's excellent, and has everything I need. The removable sidewheel is dead handy too and when I get a moment I'm going to try to set it up to see how well it'll range find out to 45/50 yards.