Tele Vue Televue Panoptic 22mm - The Tack-Sharp, Long Eye-Relief 68 degree Field Eyepiece With the Panoptic series, Tele Vue has taken the Wide-Field concept to Nagler-like performance levels - A meaningful advance over any eyepiece in its 68° field class. All Tele Vue Panoptic eyepieces have proprietary tuned full multi-coatings, blackened lens edges, high index glasses, fold-down eyeguards, rubber grip rings, cover for the eyeguard, an undercut in the barrel for extra locking security, and filter threads. All Tele Vue eyepiece lines are proprietary, in-house designs manufactured to their specifications and tolerances. Every eyepiece is individually tested at Tele Vue to ensure it meets high optical and cosmetic standards