The XF 90mm f/2 R LM WR is a 137mm-equivalent lens featuring a bright f/2 maximum aperture for low-light performance and extensive control over focus placement. Complementing the optical assets, this lens also features a weather-sealed design for working in harsh environments and has a Quad Linear Motor for quick, quiet, and precise autofocus performance. Bright f/2 maximum aperture benefits working in difficult lighting conditions and also offers greater control over the depth of field. Super EBC coating has been applied to individual elements to reduce lens flare and ghosting for improved contrast and color fidelity when working in strong lighting conditions. The lens body incorporates seven distinct weather seals to protect against dust and moisture, and to enable worry-free use in inclement conditions and freezing temperatures as low as 14°F.