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When you need more telephoto in a smaller package, the EC14 1.4x Teleconverter is an ideal choice. With only 1 stop of light loss the 1.4x converter still provides a fast super telephoto for sports and nature photography. Turn your Zuiko Digital 300mm f2.8 into a 420mm f4.0 (35mm equivalent 840mm f4.0). The EC14 is compatible with the Zuiko Digital 14-54mm f2.8/3.5, 50-200mm f2.8/3.5, 300mm f2.8, and 50mm f2.0 (f2.8 and up) lenses and is fully multi-coated to retain the high lens performance you expect. An inexpensive solution for professional-level results.