Precision Design 0.25x Super AF Fisheye Lens for Canon EOS 6D, 7D, 70D, 5D Mark II III, Rebel T3, T3i, T4i, T5i, SL1 Digital SLR Cameras All glass lens elements; Exceptionally large depth of field Reduces your lenses focal length by an amazing .25X; Offers attention-grabbing and distinctive perspectives Optimized to work with almost any lens with a minimum focal length from 18mm to 50mm Includes set of adapter rings to work with 52mm, 55mm, 58mm & 62mm filter diameters Can offer ultra wide angle, diagonal fisheye and circular fisheye images; Especially useful for real estate