Ultra-Wide Angle Lens: The Tamron 11-20mm F/2.8 Di III-A RXD Lens is a compact, lightweight F2.8 ultra-wide-angle zoom lens Compatibility: It is meant for use with Fujifilm X-mount APS-C mirrorless cameras Ideal Fit: It is the ideal lens for everyday use with its full-frame equivalent zoom range of 16.5-30mm Close Range Shooting: At the 11mm ultra wide-angle end, the lens provides stunning close-range shooting performance, with its MOD of 5.9 inches and a maximum magnification ratio of 1:4 Rapid Extra-Silent Stepping Drive: The quiet RXD (Rapid eXtra-silent stepping Drive) stepping motor AF drive is perfect for both still and video use. This zoom lens is protected by Moisture-Resistant Construction and durable Fluorine coating that provide extra protection when shooting outdoors