The Burris Fullfield™ scopes were game-changing when they first hit the market. They had a wider field-of-view than other scopes, and were manufactured with a very impressive set of features, like steel-on-steel knob construction for added reliability in the field. And bullet-drop compensating reticles for easy accuracy. The Burris Fullfield E1™ is the continuation of that. The reticles have been fine-tuned for added accuracy. The power ring zoom has been updated to make it easier to turn and to keep the lens covers from turning. But we haven’t forgotten any of the things that made this scope line so popular.