Theia Varifocal Telephoto Lenses 9-40 mm are compact high-quality telephoto lenses. The DC-iris lens has an automatically adjustable iris opening and the P-iris lens offers the capability for precise iris control and is specially made for cameras with support for P-Iris technology. Theia Varifocal Telephoto Lenses 9-40 mm allow you to take full advantage of the high resolution in HDTV and multi-megapixel cameras. With IR-correction, the lenses provide a perfectly focused image day and night. The long focal length magnifies objects far away, and the lenses have digital zoom up to 16x.