Hi, I know squat about LF. I also stumbled upon a pile of old brass lenses that I am trying to identify and then see what to do with them. I've gone through hours of browsing through various internet sites and forums hoping to find more info, with very little luck. Probably because I was like a first grader who got into a university level class - I probably wouldn't know if they talked about one of the lenses in my possession, unless they used detailed descriptions together with everything that's engraved into the barrels... Any help would be appreciated. I'll be happy if you just direct me to the place where I can find info. I will do the rest. Of course, if you want to tell me what you know, that would be fantastic. Here's a link to some pictures of some of these. Pictures are not good and don't tell much as I was in a rush and didn't make them with intention to show them asking for help. I will make more and from better angles, but this is all that I have at the moment. http://www.flickr.com/photos/63348187@N02/ For example, there are several Voigtlander & Sohn lenses. Three of them are huge (from perspective of a 35mm shooter), but one is Portrait Objective (no.6B I think), one is Euryscop (no.5) and one is Portrait Euryscop (no.6A). What are the differences between these, any important? What focal lengths? Are they all 11x14? Another is Zwierzina Plasticca 450mm f/4. Kunst-Portrait-Objektiv (looks like "portrait" was the hot word back then). That one is for 11x14 too - that's all I know. At first I thought it was an enlarger lens... Rodenstock Bistigmat is for 18x24 (I know because it says so on the barrel) but it looks like you can change its focal length using the little lever on the side... and it's very pretty is all I know. Thanks. (edit) Disclaimer: This is not a shameless (or shameful) plug as the lenses are in a small country that has no LF market and shipping from it would be problematic.