viltrox VILTROX 13mm f/1.4 F1.4 Fuji x Mount Ultra Wide Angle APS-C AF Lens Fujifilm New Written by admin on March 24th, 2024. VILTROX 13mm f/1.4 F1.4 Fuji x Mount Ultra Wide Angle APS-C AF Lens Fujifilm New. 13mm (35mm Equivalent Focal Length: 20mm). 14 Elements in 11 Groups. Dimensions (ø x L). 74 x 90 mm.