While looking at some optics co's websites, I see under "parallax setting" it will say 10 - infinity, for example. When it says *blank* to infinity, and I set it to infinity, is that the same thing as parallax free? I'm looking at parallax free for close range so my eye doesn't have to be looking perfectly at the scope. wherever the red dot is, that's where might shot will go. I'm new to optics so any suggestions would be appreciated.