Product Description Name Laowa 20mm f/4 Zero-D Shift Focal length 20mm Aperture Range f/4 – 22 Coverage of image circle Ø 65mm Format Compatibility Full Frame Angle of view 94.4° Lens structure 16 elements in 11 groups (2 aspherical elements and 3 ED elements) Filter size 82mm Aperture blades 14 blades Maximum magnification 0.17x Min. Focusing Distance 25cm In-focus driving mode Manual (MF) Dimensions About Ø 95mm * 91mm Weight About 747g MTFOptical Structure