The model HD-2205PRO High-Definition Super Telephoto Conversion lens is made of the high index coated optical glass elements with new concept of lens designing using two-group/four-element lens formula. This new concept in designing the lens made it possible to achieve an amazing high definition Telephoto lens of the 200 lines/mm resolution power at center (MTF30%)The HD-2205PRO is an ideal item for HDV, AVCHD Compact High Definition Camcorders