This 10.5mm lens provides digital SLR camera users an extreme picture angle, equivalent to that of a 16mm fisheye lens on a 35mm [135] format camera. The lens is targeted at Nikon DX Format digital SLR camera users who seek the unique visual effects a full-frame fisheye lens lends to landscape and other shots, to taking close-ups, or when shooting within vehicles or other tight interiors. Optical and close-range focusing performance are both optimized for Nikon DX Format digital SLR cameras. The ED (Extra-low Dispersion) glass element minimizes chromatic aberration for clear, natural colors, and the rounded seven-blade diaphragm opening ensures a natural look to out-of-focus elements. This G-type Nikkor lens is designed with no aperture rings, and offers easier, virtually mistake-free operation because the aperture does not need to be set to minimum. Note: Use of DX lenses are NOT recommended with 35mm or APS SLR cameras. Features: Ultra wide picture angle of 180 degrees on DX sensor achieved by producing a smaller image circle (the size of the image that is projected by the lens on to the sensor) enabling smaller lens diameter, lighter weight and optimal image quality from center-to edge-to-corner on the image. Equivalent to 16mm focal length on 35mm Minimum focus distance of 0.14m (5.5 in.), or 0.03m (1.2 in.) from the lens front, makes extreme close-ups possible Close-Range Correction (CRC) provides high performance for sharper images when taking pictures up close Extra-Low Dispersion (ED) glass element minimizes chromatic aberration Design enables a combination of wider angle-of-view with optical characteristics that are optimized for Nikon digital SLR camera sensors Nikon D-type design provides precise distance information for flash and ambient light exposure processes Rounded diaphragm to make out-of-focus elements appear more natural G Type DX Nikkor is designed exclusively for use with Nikon Digital SLR models Built-in Flower Type lens Hood