A specialized optic for truly close-up shooting, this 20mm f/2 4.5x Super Macro Lens from Mitakon Zhongyi is designed for Canon EF, Nikon F, Pentax K & Sony A-mount DSLR cameras. Offering a magnification range of 4.5x to 4x, and a minimum working distance of 0.8″, this lens is solely designed for producing greater-than-life-size images of small objects without the need of extension tubes or other accessories. Its compact form-factor makes it ideal for placing into tight or awkward shooting angles and a metal lens barrel offers durability and rigidity. Specifications: Focal Length: 20mmAperture Maximum: f/2Minimum: f/16Camera Mount Type: Canon EF/ Nikon F/ Sony A/ Pentax K/ Sony E/ M43/ Fuji X/ EOS-MFormat Compatibility: 35mm Film / Full-Frame Digital Sensor/ APS-CMagnification: 4.5xMaximum Reproduction Ratio: 1:0.22Minimum Focus Distance: 0.79″ (20 mm)Optical Design: 6 Elements in 4 GroupsDiaphragm Blades: 3Autofocus: NoFilter Thread: NoneDimensions (DxL): Approx. 2.44 x 2.36″ (62 x 60 mm)Weight: 8.11 oz (230 g)Package Weight: 0.65 lbBox Dimensions (LxWxH): 4.5 x 4.2 x 4.0″