All, For the last couple of months I've been keeping my eye open for some old lenses to experiment with; perhaps even the famed petzval lenses. I haven't had much luck on sleezebay, etc. I did find one through the APUG classifieds, but it was around 140mm in focal length. Did they ever make a petzval designed lens in a 200-280 focal length ? Or were they all usually shorter ? Thanks !