If you like the idea of having am Drop-in Filter Adapter for M4/3 cameras you can now join the crowfunding project at Indiegogo (Click here):
OWL combines camera adapter and exchangeable filter. User can change filters in a quick and convenient way during filming or photographing. It advances your workflow and cost saving. From now, you just need to prepare one filter to fit all your lenses. You will definitely have a total new experience in photography.