Fujifilm GF 250mm f/4 R LM OIS WR LensThe Fujifilm GF 250mm f 4 R LM OIS WR Lens is the longest, interchangeable telephoto lens created for the G Series of medium format digital cameras. The Fujifilm G Format is the most innovative and highest quality in the world, sporting a 43. 8x32. 9 CMOS sensor. This lens is a powerful and dynamic telephoto lens with a 35mm focal length equivalent of 198mm. A bright f 4 maximum aperture gives you sharp and clear images even in low light conditions.