This is a Panasonic long throw lens (model TY-LECTE300) that can be used for the AE100, AE300 and AE500 projectors. It greatly increases the flexibility of placement by increasing throw by a factor of 1.2 times. It screws directly on to the existing lens and fits perfectly. This was a must in my particular setup of 110” screen with projector mounted 14 1/2 feet away. Originally sold for $500 and is in excellent condition. $100 shipped. Pictures available upon request.