The XF 27mm F2.8 R WR is an ultra-compact 'normal' prime for Fujifilm's X-system mirrorless cameras, and offers a 40mm equivalent angle of view. It's one of the smallest and lightest X-mount lens available. While it's optically the same as its predecessor, Fujifilm managed to add an aperture ring and weather-sealing without increase the size of the lens.