GPS

“Parallax: A condition that occurs when the image of the target is not focused precisely on the reticle plane. Parallax is visible as an apparent movement between the reticle and the target when the shooter moves his head or, in extreme cases, an out-of-focus image. Our centerfire riflescopes under 11 power are factory-set parallax free at 100 yards: rimfire scopes at 50 yards. Scopes of 11x or more have a special range focus to adjust for parallax.”