Don't think I ever posted any footage samples of the vintage 85mm F/1.2 on the GH2, so here it is if you're curious. Old lenses are a great alternative to getting DOF on a budget. There's a variety of different adapters to mount just about any lens type to any camera. For a list of old Vintage lenses, check out the eBay auctions. Just make sure you choose the right adapter for the Lens you choose to fit your camera body.
Here i'm using an FD adapter without glass to make this 85mm F/1.2 work on the Panasonic GH2. At F/1.2 there's a soft glow, but step it down to F/1.8 and it's plenty sharp. They will never be as sharp as true lenses designed for Digital, but that's the whole allure about them. Sometimes they give off a really vintage feel. Oh and I didn't bring an ND filter out so the shutter speed was quite high on this footage. Might look at bit jittery...
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).