The 1” tube Optika5 2-10x42 Z-Plex is for high powered rifles and for rimfire rifles. It features MeoBright lens coatings for optimal light transmission and MeoDrop hydrophobic water repellant coating. High powered rifle 2-10x42s are set parallax free at 100 yards, while the rimfire version has adjustable parallax from 10yds to infinity for close range shooting. Second focal plane reticle.