Tele Vue Eyepiece Barrel Extension (2") Celestron 52308 It offers a wide viewing

It offers a wide viewing angle of 50

or shooting in bright conditions

45 lb Box Dimensions (LxWxH) 17

Comfortable Headrest

Tele Vue Eyepiece Barrel Extension (2") Celestron 52308 It offers a wide viewingThreads on to 2" Filter Threads Adds Path Length Made in the USA With certain eyepiece telescope combinations, it may be necessary to add this Tele Vue Eyepiece Barrel Extension accessory to achieve necessary path length for proper focus or lack of interference. This eyepiece barrel extension threads on to a 2" eyepiece's filter threads, and can make some eyepieces parfocal with other eyepieces ( the Nagler 12mm becomes parfocal with the Nagler 17mm &