Lensa Fisheye Sunex SuperFisheye 5,6mm F/5,6 -185 degrees

Sunex SuperFisheye 5.6mm F/5.6.
Focal Length: 5.6mm.
Aperture: f/5.6, fixed.
Image Circle: 14.5mm.
Coverage: 185 degrees.
Optics: Proprietary patent-pending design, multi-coated.
Resolution: Virtually diffraction-limited.
Focus: Pan-focus: everything from about 20" (0.5m) to infinity is always in focus.
Size: 3.132" extension from flange x 2.756" diameter (79.56 x 70.00mm), measured.
Weight: 16.530