Opteka 2x HD2 Telephoto Lens for Canon ZR100, ZR200, ZR300, ZR400, MV800, MV800i, MV830, MV830i and MV850i Digital Video Camera A 2x converter will double your camera's maximum focal length, bringing things twice as close. High-index / low-dispersion optical glass, Digital Multi-Coated, Titanium anodized finish High speed auto-focus / Infrared compatible Maximize day and night shots by providing maximum light and image transmission Lens bag and lens covers included