Equipped with a range of features, the Nikon Fisheye-Nikkor Ai renders professional-looking images. This full-frame Nikon camera lens features a focal length of 16 mm and a wide aperture of f/3.5. Lending an ultra-wide-angle fisheye perspective, this 16 mm f/3.5 lens produces strong depth cues and dramatic visual distortion to render a wide, panoramic image effect. In addition, the Nikon Fisheye-Nikkor Ai lens construction is eight elements in five groups. Color aberration is well corrected on this 16 mm f/3.5 lens. It employs Nikon's integrated coating which helps in proving stark contrast even at full aperture. Furthermore, this Nikon camera lens is fully automatic with hemispheric coverage of 170 degrees and a maximum reproduction ratio of 1:13.4. Weighing in at 11.7 oz and measuring 68 x 60.5 mm, the Nikon Fisheye-Nikkor Ai is extremely compact and highly portable. It can lend an artistic approach to a photographer's shot anytime, anywhere.