A superb fisheye lens with a look all its own a fascinating perspective on landscapes, cities, crowds, and special events. With a 180 degree angle of view and extraordinary corner-to-corner sharpness, this lens achieves crisp, clear detail from about 8 inches to infinity. Mounted on the Sony DSLR-A100 camera, it provides a 110 degree angle of view with 24mm focal length (35mm equivalent). Crisp focus from about 8 inches to infinity Quick filter selection with a simple rotating dial Focal length - 35mm equivalent, 16mm Minimum focus distance - 8.4 inches (20 centimeters) Maximum aperture - f2.8 Minimum aperture - f22 Maximum magnification - 0.15x Lens groups/elements - 11 elements (no aspheric) in 8 groups with 7 aperture blades Intergrated Filter diameter Distance scale Depth of field Dimensions - Approximately 2 15/16 x 2 5/8 inches (75 x 66.5 millimeters) Weight - 14.1 ounces (400 grams) Color - Black