Zeiss Zeiss Ikon Wide Angle 25mm f/2.8 Distagon T ZF Series Manual Focus Lens for the Nikon F (AI-S) Bayonet SLR System. Superior wide-angle performance combined with extreme close-up potential: a MOD (minimum object distance) of only 6 cm from the front element! Impressive sharpness; clearly beyond even the best color films available today Long-life all-metal barrel of very high precision