The ED150mm f2.0 is a lens with high imaging capability, designed exclusively for use with Olympus FOUR THIRDS single-lens-reflex digital cameras. It has a dustproof and drip-proof construction. It is a super-telephoto lens corresponding to a 300 mm lens for a 35 mm camera. The lens features a high-quality F2.0 aperture with 11 elements in 9 groups, including one Super ED and one ED glass elements (ED: Extra-low Dispersion). It can be used in combination with the optional EC-14 teleconverter, with the aperture set at a composite f-stop of f4 or more. It can also be used with the optional EX-25 extension tube under specific conditions.