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...
Canon FD mount lenses designed originally for older film cameras are a beautiful option for many video shooters. Not only are they wildly popular with DOF adapters to be used with standard camcorders, you'll find DSLR bodies such as Panasonic, Sony, Olympus, Nikon, and new Canon DSLR's adapting these older lenses to get wide apertures on the cheap. The controls are completely manual to set aperture and focus. Many enjoy shooting these older lenses simply because the focus rings work better for pulling focus in video mode.
There's a bunch of different adapters to mount these FD lenses to just about any camera. For Canon this i'm using one which has an extra piece of Optical glass to correct the image and prevent vignetting at wider angles. For other cameras, i'm not sure if the optical glass would be necessary. If you've got an FD lens adapter story to share, post your comments here.
It's also pretty sharp, but not too sharp and often giving a very vintage feel with your footage. The look from these lenses will definitely give artistic video shooters a bit more of a creative documentary feel with a slightly softer high contrast look. Here's a good example video https://vimeo.com/3919586 that was posted (now 2 years ago). You can catch groups on both Vimeo and Flickr all dedicated to older FD and FL vintage lens styles. The current EF auto focus 85mm F/1.2 runs for close to $2,000 dollars. Look carefully and you'll catch an 85mm F/1.2L FD mount (yes L lens) for less than a third of the EF mount price. Of course F/1.2 should provide you with a beautiful image, but it's not your only option. There are many other other great FD lenses to be adapted including F/1.4, F/1.8, F/2.0 with all ranged from Fisheye Wides to Super Zooms.