The celestron observers accessory kit enhances the performance of your telescope this kit includes two high quality 125 plossl eyepieces a 2x barlow lens that can be used visually or photographically three eyepiece filters a cleaning cloth and a case with two extra eyepieces and a barlow lens youll have four different magnifications to choose fromr robservers accessory kit includesrinside the plastic foam lined carry case youll find these accessories r17 mm plossl eyepiece 1