Compatibility  This lens works only on Nikon DX cameras.    Optics  19 elements in 14 groups.  3 ED glass elements.  3 Aspherical elements.    Diaphragm  9 rounded blades.  Stops down to f/22-32.    Focal Length  18-300mm. When used on a DX camera, it gives angles of view similar to what a 28-450mm lens gives when used on an FX or 35mm camera.    Angle of View  76° ~ 5.3° on DX.    Close Focus Ratio  1.5 feet (0.45m) from the image plane. 1:3.2 (0.31x).    Weight  29.213 oz. (828.2g), measured.  Nikon specifies 29.3 oz. (830 g).