> I've been informed that there are some Nikon lenses that are made of > a plastic material (for the optics) rather than glass. Is this true > and if it is , is the quality equal to glass? Some lenses, such as the 28-70/3.5-4.5 have a compound aspheric lens. These have an aspheric plastic surface molded onto a normal spherical glass lens. I doubt these lenses would be used unless they were superior to glass lenses. Plastic is softer than glass, and as far as I know, they are only found on internal elements where they are protected from wear. Roland
