One of the reason I got my Speed Graphic was (as many others) to be able to use barrel lenses. As I understand you can find a lot of quirky barrel lenses to experiment with that weren't designed with photography primarily in mind (such as projection lenses and so on), and I was wondering if you had some recommendations of such lenses. I'm mostly looking to do either portraiture, stilleben or landscapes/nature and I'm looking for something that's relatively cheap and fun to experiment with, technical performance isn't that much of an issue (allthough I'd still prefer something a step above a meniscus lens), any suggestions on what I should look for and where I might find it?