Raynox High-Definition Telephoto Conversion Lens 2.2x zoom offers a closer look to the subject of interest. The lens is made of high-index optical glass elements, with a new concept of lens design that uses a multiple-group lens formula. With anti-reflection coating on all surfaces of the element, it allows to achieve an excellent high definition image. The telephoto conversion lens is recommended for those installations where long distance subject needs to be monitored.