The burnside 35 is a manual focus. This is a standard Lens available in many camera mounts. This video shows you the fun it can be behind the lens. This lens is no longer in production but you can sometimes pick them up on ebay.
The Burnside creates a unique bokeh swirl when the subject and the background are distant. My suggestion is to be creative and see what you can do.
This series of short videos shows what you see in the camera and the lens effects you get in the camera with little to no post-production work.
Please, let me know if there is a specific optic or lens you would like to see demonstrated. Lensbaby USA.
Disclaimer: I am NOT an ambassador and do not make money off the sales of these products. I think they are fun and worth sharing. But I know a lot of Ambassadors, so if you want to buy one, ask me, and I will hook you up with one. They can usually offer a discount code. That always helps. The company that sells these is Lensbaby. But I will warn you they are addictive.