What filter size does the olympus m zuiko 300mm f 4 is pro take?

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From Olympus M.Zuiko 300mm f/4 IS PRO: Olympus M.Zuiko 300mm f/4 IS PRO: A prime lens by Olympus for Micro Four Thirds cameras, 300mm f/4. Specs - Maker: Olympus - Focal length: 300mm (prime) - Maximum aperture: f/4 - Made for: Micro Four Thirds sensors - Mounts: Micro Four Thirds - Stabilised: yes - Autofocus: yes What it frames like - On Micro Four Thirds (Micro Four Thirds): like 600mm on full frame; f/4 gives about the depth of field of f/8 there. ...

From Olympus M.Zuiko 150-400mm f/4.5 TC1.25x IS PRO: Olympus M.Zuiko 150-400mm f/4.5 TC1.25x IS PRO: A zoom lens by Olympus for Micro Four Thirds cameras, 150-400mm f/4.5. A built-in 1.25x teleconverter takes it to 500mm at f/5.6.

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