About three years ago I have assembled my Petzvar 120 mm portrait lens. It is made by the original Petzval scheme, non-improved or re-engineered, but given a contemporary lens barrel with the iris diaphragm and 72 mm filter thread mount for easy use. I must admit, it has become one of my favorite lens. Here you can see a sample images: http://ivanichek.com/Medium%20format%20Petzvar%20Petzval%20lens.htm Do you think, this is an interesting lens to try a small batch production project, or should I just keep playing with it myself? Please, share your opinion or suggestions. Cheers, Dennis.