Athlon Optics ， Cronus ， Binocular ， 8.5 x 42 ED Roof ，[Product Information]- Enter your model numberto make sure this fits.
- E2ES System - E2ES System is a field flattening system that produces sharper， clearer images all the way from one lens edge to the other
- ED Glass - ED glass gives you an image with little or no chromatic fringe so the final result brings a clearer and sharper image to your eyes
- ESP Dielectric Coating - ESP Dielectric Coating is a multi layer prism coating that reflects over 99% of the light to your eyes bringing you a clear， bright image that displays accurate color reproduction.
- Advanced FMC - Advanced Fully Multi-Coated lenses gives you better light transmission to bring optimum brightness and true color across the entire light spectrum.
- Argon Purged - Argon purging gives you better waterproofing and thermal stability
