This rugged variable power scope has one of the largest diameter front lenses available. A 65 mm objective lens provides the user with the ultimate in image brightness. The 6-18x65LU is the ideal rifle scope for target and varmint applications You will never lose sight of your crosshairs due to darkness while using the ATN's scopes. ATN illuminated reticle has a 10 position rheostat. The intensity of the reticle can be adjusted to your specific lighting conditions. The Everlight and Proshield lens coatings were designed to help prevent glare and scratches, while providing you with a sharp image in both bright and low light conditions. Accuracy was our number one priority when designing this weapon sights.