The Tamron 11-20mm f/2.8 Di III-A RXD is an ultra-compact, fast-aperture wide-angle zoom lens engineered for Fujifilm X-mount APS-C mirrorless cameras. Delivering a constant f/2.8 aperture throughout its 11-20mm range (equivalent to 16.5-30mm on full-frame), this lens excels at landscape, architectural, and street photography without compromising portability. The innovative RXD stepping motor provides fast, silent autofocus perfect for both stills and video work. At just 335g and 86mm in length, it remains perfectly balanced on compact mirrorless bodies. Features include moisture-resistant construction, protective fluorine coating, impressive close-focus capability (0.15m at 11mm), and a unified 67mm filter thread shared across Tamron's mirrorless lens range.