16mm F/2.8 Fisheye This fisheye covers a diagonal angle of view of 180 degrees from corner to corner of the picture. It can autofocus landscape, architectural and interior photographs. A special lens hood forms an integral part of the lens barrel. Four built-in filters are included. FEATURES: * Lens: 16mm F/2.8 * Construction: 11 elements in 8 groups * Angle of view: 180 degrees * Minimum focus: 0.7 feet * Filter: Integral * Weight: 14-1/8 oz.