Vortex Diamondback rifle scopes are made for hunters, which come for an affordable price, and good build quality. The lenses are fully multi-coated for a bright image with good resolution. The entire housing is made out of a one-piece aircraft-grade aluminum, to withstand every hunting scenario. The housing is also hard anodized, which makes the scopes more scratch resistant. All Vortex Diamondback rifle scopes have variable magnification, and the zoom factor is 3 times.
In this series of rifle scopes, all are built with an 1-inch main tube diameter. The parallax on all - except the 4-12x40 AO is fixed on 100 yards (91 meters). The 4-12x40 AO rifle scope has an AO (Adjustable Objective) for focusing on targets on different distances, from 10 yards (9 meters) to infinity. The reticle is placed in the second focal plane (reticle size stays the same at all magnifications) and is non-illuminated.
The turrets are capped for more protection, and all scopes have an adjustable eye-piece for people with different diopters. All rifle scopes are O-ring sealed and argon purged for a fog-free view in all weather conditions. The warranty on these products is 10 years.
The Vortex Diamondback rifle scopes can only be mounted with 1-inch rings.