Designed for estimating the range to and size of targets, the Vortex 33.5x Viper HD Reticle Eyepiece is built specifically for the 85mm Viper HD spotting scope to replace the stock zoom eyepiece. Utilizing a fixed magnification greatly improves resolution to make finding, identifying, and spotting shot placement easier and more precise. Designed for MOA shooters, the reticle layout is simple and uncomplicated to leave the generous field of view clear, while providing hash marks along the horizontal and lower vertical axes for ranging. The reticle can be rotated to align with the horizon if you're set up on uneven ground and the spotter isn't perfectly level. This is an ideal solution for calling shots in team shooter applications.