Free Express Shipping! ZEISS Biogon T* 21mm f/2.8 ZM Lens (Silver) Leica M-Mount Lens, Aperture Range: f/2.8 to f/22, ZEISS T* Anti-Reflective Coating, Manual Focus Design, Minimum Focus Distance: 1.6', Filter Thread: 46mm, 10-Blade Diaphragm