4 element petzel design with fluorite lens element, built in field flatner, ivory tube, screw-in metal dust cap, clamshell ring mount and dew shield. Includes TV hard case and original manuals but no diagnol or eyepieces. 3 deep space pics shown (M13, M27, M51) were taken using a Nixon CP4500 digital camera. Selling because just upgraded to an AP130. Looking back over the last year, these have sold from $1200 to $1400. This one is priced to go at only $1100.