Olympus M.Zuiko Digital 2x Teleconverter MC-20 Doubles the Master Lens' Focal Length for Super Telephoto & Super Telephoto Macro Shooting: Portability, Dust/Splash/Freezeproof (-10°C), Compatible with M.Zuiko Digital ED 40-150mm F2.8 PRO, M.Zuiko
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Olympus MC-20 Teleconverter | Page 4 | Mu-43
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Olympus 2X MC-20 M.Zuiko Teleconverter for Select Pro Micro Four Thirds System Lenses at KEH Camera
My review for MC-20, the 2x teleconverter from Olympus: Micro Four Thirds Talk Forum: Digital Photography Review