I have both 90 and 150mm lenses in Copal 00 shutters and would like to add something a little longer. That said, I would like it to be as small and light as possible for two reasons; carriability, and compatibility with my camera - a 5"x4" Gandolfi with a restrictive front unless I reconstruct the this somewhat (apparently mine has a special order front!) which I can do but would obviously prefer not to. I'm not overly concerned with 'ultimate' image quality so the latest and greatest lenses don't interest me, and I'm happy to use something like a small process lens as long as it works reasonably for landscapes at infinity or there about. Lower cost would be better too. Any suggestions?