C> The one good thing about tubes is that you really don't need to worry C> about what brand you buy. Since there is no glass in them (they are C> just hollow tubes) you don't need to worry about them affecting image C> quality the same way a lens does (just make sure they are light-tight!).
Ah Christian now it is obvious that you have never tried Leitz
extension tubes. The difference in quality of photographs is
astounding!!!
;-)
Good light!
fra
