The Voigtlander 28mm F/2.8 Color Skopar SL IIs - Nikon Fit is a fully mechanical 28mm prime lens with a maximum aperture of f/2.8. It features 7 optical elements arranged in 6 groups, using double sided aspherical lenses, which ensure the image retains sharpness all the way to the corners and allow the lens to focus as close as 6 inches.