Excerpt: The lens includes a snap-on universal mount suitable for 52mm to 67mm filter size. DCR-250 Super Macro lens obtains the maximum macro magnification power when set at the most telephoto position of zoom lens. The lens is made of high index optical glass elements which produce rich and razor sharp image. Lens construction : 2G/3E, made of optical glass lenses, all surfaces fully coated. Front filter size : 49mm Rear threads size : 43mm Size/Weight: : 53x18mm/60g.