Get the extra speed and brightness of a large F1.8 maximum aperture in a conveniently compact design, plus high performance 55mm full frame format. This Carl Zeiss Sonnar T* mid-range lens provides the perfect pair for Alpha a7 Series full frame cameras. Specifications: Minimum Focus Distance: 19-11/16 inches (.50m) Magnification: .14x Filter Diameter: 49mm Lens Type: E-mount Full Frame Aperture (Max.): f/1.8 Aperture (Min.): f.