Focal length and maximum aperture 85 mm f18 lens construction 9 elements in 7 groups diagonal angle of view 28 degrees 30 degrees focus adjustment rear focusing system with usm closest focusing distance 085m 28ft filter size 58mm a highly practical medium telephoto lens with superb delineation and portability if you want a highly practical medium telephoto lens with superb delineation and portability the ef 85mm f18 usm is for you images are sharp and clear a