I got a Burris Fullfield II with the ballistic plex in the spring and absolutely love it! The b-plex is right on, its sighted in for 100 yds and works easily out to 200 yds, just havent hade the oppurtunity to use it farther. I got a steal on it at a mom and pop gun shop here for around $160, worth every penny spent. Itsextremely clear, and you cant do better than a forever warranty. I know it comes in 50mm you should check it out