Actually, multicoating was invented in 1938 at GE, but not widely used until the 70s. But was it Pentax? Or Zeiss? Or both? http://gabriel.mp3-tech.org/blog/index.php?entry=entry090203-153355 On Nov 20, 2010, at 6:33 PM, Koichi Mac wrote: > Huh! That information is from the very company that invented multi-coating > in 1970. Am sure they saw other vendors catching up and forgot to fine-tune > the finesse part of multi-coating afterwards. :-D Eric There are 2 theories to arguing with a woman... neither works. - Will Rogers.