EF35-350mm f/3.5-5.6L USM ... -angle 35 mm to super-telephoto 350 mm . ... 70-200 mm f/2.8L . Two UD (Ultra-low Dispersion) glass lens elements (2nd and 3rd) in the first lens group thoroughly eliminate chromatic aberrations at telephoto focal length, realizing the high image quality befitting an L series lens. ... 0.6m is possible at any focal length from 35 mm to 135 mm , with a maximum macro magnification of 0.25X obtained at 135 mm position.
Setting the focus range, limits the area in which the lens can attempt to focus, thereby speeding up the focusing process. The EF 300 mm f / 2.8 has three ranges: 3m - infinity (9.8ft - infinity)
