Vortex Razor HD riflescopes are the best product that the Vortex company is able to produce. This means that there is not much left to be desired with Vortex Razor HD. The construction withstands shoots fired with a .50 BMG rifle, it is 100% waterproof and argon filled to prevent dew build up even under extremely low temperatures. The really amazing qualities still lie in its optical features. All lenses are made from a special type of glass to prevent light dispersion and multi coating ensures minimal chromatic aberration. Special computer equipment is used in assembly for the right lens positioning and this is just one of many things that make the Vortex Razor HD an extraordinary riflescope. The reticle is seated in the first focal plane and it has matching reticles spaces with the click values of turrets. In the case, that the distances between two points on the reticle are given in milliradians, the turrets move the reticle in equal units. You can even choose an MOA reticle which has the matching turrets and values given in minutes of arc. All reticles are illuminated. All Vortex Razor HD riflescopes have a lifetime warranty.