Summary: Plastic, light weight. Not a high quality lens, BUT, gives me really sharp pictures and the possibility to go really close to an object and still be able to focus. Great leans for that price! Something everyone should have in their camera bag.
Summary: The optical quality of this lens is good enough for casual everyday use. There is very little chromatic aberration and very little barrel distortion for a lens this cheap. Outdoor shots have decent contrast and sharpness, but not the pristine sharpness of an expensive lens.