"The latest in the line of proven Fullfield rifle scopes from Burris, the Fullfield E1 Rifle Scope combines outstanding optical performance and accuracy with an advanced reticle. This scope starts with high-grade optical glass lenses fully multi-coated with Burris' index-matched HiLume coatings for optimal low-light performance and glare elimination. The scope's advanced Ballistic Plex reticle features marks for determining holdover at distance, while the Ballistic Plex E1 reticle adds marks for distance and hold-off for wind drift, giving hunters dead-on aiming from 100-500 yards for nearly any big-game hunting cartridge. Built in a solid 1-piece, 1"" outer tube, this sturdy scope features a double internal spring-tension system that holds zero through the shock and recoil from the heaviest-recoiling calibers. Nitrogen-filled design provides waterproof, fogproof, and shockproof performance, even in even in cold and rainy hunting conditions. The finger-adjustable, capped, low-profile turrets adjust easily in the field, offering positive steel-on-steel adjustments to ensure repeatable accuracy. You can even order a custom turret (not included) matched to your preferred cartridge's ballistics from Burris for even simpler distance dialing. The updated, easy-to-grip power ring turns easily (even with gloves) while the eyepiece does not rotate so it can accept flip-up lens covers. Manufacturer's lifetime warranty. Proven Fullfield scope performance with an advanced E1 reticle Multicoated lenses with index-matched HiLume multi-coating for high light transmission Advanced Ballistic Plex or Ballistic Plex E1 reticles - dead-on aiming from 100-500 yards Ballistic Plex E1 reticle - features marks for distance and hold-off for wind drift Tough, 1-piece aluminum tube construction - 1"" tube Double internal spring-tension system - stands up to the heaviest-recoiling calibers Positive, repeatable, steel-on-steel adjustment Low-profile, capped turrets Updated, easy-to-grip power ring Nitrogen-filled for waterproof, fogproof, and shockproof performance"