Here's a very quick look at the new Rokinon 10mm F/2.8 Prime Lens for Micro Four Thirds cameras. This lens mounts directly to MFT cameras such as the GH3/GH4/ or BlackMagic Pocket Cinema Camera.
I was looking for a lens that could offer a wider field of view over my 12-35mm F/2.8, but after receiving the lens I was a bit disappointed. The size of the lens and lack of front filter threads made it harder to work with than my existing lenses.
Rokinon 10mm F/2.8 MFT Prime Lens
Considering it lacks image stabilization and is priced at over $520 dollars, if you're looking for a good Rokinon MFT Prime Lens for video I think the better choice would be with the Rokinon 12mm F/2.0 for $399.