I've seen various focusing helicals made in China for sale on eBay over the last few years, and I just bought one from a seller named "jinfinance," and I received it, and I'm very impressed. It's really a nice piece of machine work. They advertise it for a 65mm lens-- http://cgi.ebay.com/WIDE-ANGLE-DEVI...511?pt=LH_DefaultDomain_0&hash=item20b44cf7bf I asked them if I could have it engraved with a scale for a 47mm lens, so I could use it with my 47mm S-A XL, and it works perfectly. It focuses to infinity, and it focuses to 0.4m, and of course one could focus closer by moving the lensboard forward. It also doesn't vignette in the vertical orientation on my 4x5" Tech V with the bed dropped two notches. The only thing missing is an index mark on the board for the focus scale, but that's something I could add myself easily enough, and if I actually want to use the scale, I either have to manually slide the front standard to the infinity focus point while checking the groundglass with a loupe, or I could make an index mark on the rail, since the standard has to be inside the box, where it isn't possible to put infinity stops. In practice, I'll probably be focusing mainly with a loupe on the groundglass, in which case it doesn't need to be exactly aligned at infinity, but it's nice to have the option.