Olympus currently has a [shoplink 62479 ebay]1.4x teleconverter for MFT[/shoplink] only. But soon there could be a nice addition. Egami spotted a new Japanese Patent disclosing the design of a new 2.0x MC-20 MFT teleconverter. This will Doubles your Focal Length and a 300mm PRO lens suddenly because a 600mm lens with slower aperture.