No personal experience, but I can tell you that Caltar II N series lenses are equivalent to the Rodenstock Sironar and Grandagon series lenses and are very good. Caltar II E are less expensive and equivalent to the Rodenstock Geronar series. They are also nice, but simpler in construction than the II N lenses. There are also some very nice Caltar II S lenses that are Schneider lenses and equivalent to the Symmar-S and Super Angular series. I would think that any of these lenses will be great if you find one with enough for your 5X7 and I agree that they seem to be less expensive then their brand name bretheren.Originally Posted by KEK
There are also older Caltar lenses which might be nice but information seems sketchier. It appears that some were made by Topcon in Japan and also some of the really old ones were Ilex lenses made in the US.