I currently have a 10" Ektar 6.3 lens, other identification inclues No. 4 Acme S ynchro. I also have a Compur 4.5 Tessar 13.5cm with identification of F. Deckel Munchen/ Carl Zeiss. First off, can anyone identify the quality of these lenses? My intent is to shoot 4x5 B&W landscapes with a 90 mm and print to a width of a pprox. 4 feet. Probably shoot T-MAX 100 and process in Kodak recommended chemist ry...still undertermined. Based on what I've seen at this sight, it appears that a Super Angulon LF? is the lens of choice. Any comments would help.