This is a small compact 12mm wide angle lens. Perfect for your Sony of MFT (BMPCC / GH4) Cameras! Also available in Canon-M, Fuji, Samsung NX, etc. Lighting Deal is live and almost out of stock. Typically about $370+ for this lens, now down to $309.
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.
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.
Just listed out my Canon 85mm F/1.2L in the classifieds https://bit.ly/e608Tp. There she is seen on the Panasonic GH2 (above). Sad to see her go, I thought of her as a nice collectors piece, but she hasn't seen much use lately. If you're working on MFT (micro four thirds) like Panasonic AF100 or Sony cameras like the new FS100 with a shallow sensor-to-flange ratio you might get the best use out of these old lenses.
Now this FD 85mm F/1.2L is a bit of an oddity and fetches for a higher price, but for other great inexpensive Manual Focus lenses that can be had for less than $30 dollars, check out the link below. Just make sure you get the right adapter for the right type of lens you're looking at. These days you can practically find an adapter to mount just about any brand lens to any type of camera (or course results will vary).
Canon Manual Focus Lenses