Borg 100mmED lens. This is the objective in a cell with the attached dew shield. Like new because it is only a few weeks old. Also have the matching 115mm diameter tube, 335mm in length. You would need to obtain the correct back end with a focuser. You should have this if you own a 5" Borg in the 115mm tube. New from Hutech at $1250 + $226 = $1476. Will sell for $1100 plus shipping/insurance. Images are very color free. Makes a great travel/photo-visual scope. Will not fit the 80mm tube.