Celestron Ultima LX Series - 1-1/4 inch - 2 in 17mm 93369 70 Degree Wide FOV - For high and low magnifications Extendible twist-up eyecups - Good for eyeglass wearers Parfocal eyepiece - Little or no focusing needed when changing from low to high power Threaded barrels - Accept 1-1/4" or 2" Celestron thread-in filters Shock resistent rubber covering - Scratch and dent resistent