Mounted on the pentax series of digital slrs the da fish eye 10 17mm lens will capture fish eye imagery with a 180 degree angle of view and a focal length of 10mm as well as super wide angle performance capture images with an expanded perspective including creative deformation of subjects and sharp pan focus that extends throughout the entire frame the image circle in da series lenses is designed to perfectly match the 235mm x 157mm size of the ccd used in pentax digital slrs to optimise ca