Tele Vue Bino-Vue with 2x Amplifier The included Bino Vue 2x amplifier now has filter threads built-in, so you can easily use your Tele Vue Mars filters, Type A and Type B, or other 1 " filters. 27mm aperture prisms to permit full use of maximum field 1" eyepieces such as 24mm Panoptics Multi-coatings and dielectric beamsplitter coatings for highest transmission with neutral coloration. Collet-type adjustable eyepiece clamping for non-marring, rock solid security with no chance of high powered collimation loss from screw-type diopter adjustment systems. 100% inspection, collimation Q.C. to assure prevention of eyestrain. Factory collimation checking and realignment service available with quick turnaround.