2.2x High Definition Telephoto Lens 4 Groups / 4 Elements (Stronger Alternative To Olympus TCON-17X) 2.2x High Definition Telephoto Lens | Construction 4 Groups/4 Elements Optimized For Mega Pixel Photography. Extreme Speed Auto Focus yields crisp and clear images. High Definition Digital Lens | 0.3% Vignetting, 1.0% Distortion Rate MultiCoated Optical Glass Uses 72mm Filters. Length 2.0" (50.8mm) | Weight 8.8 oz. (232g)