Gregory, Is your lens a "real macro" or an "erzatz" closer focussing so-called macro lens... ie will it provide you with (at least a 1:2 magnification)?? Generally, tele-converters degrade image quality to varying degrees.. (unless you have the really expensive ones to match your Leitz lenses) However, if you are wanting "real" macro ie > 1:1, may I suggest you attach a short focal length (24 or 28mm) "reversed" mounted to the front of your 105 macro (or any other longer lens) by way of a male/male threaded ring. Ken >I am green when it comes to macro work, but I have recently purchased a 105 >macro. What happens to reproduction/mag ratios when you add a 1.4 >Teleconverter? Or, is this not advised? > >Take care, >Gregory david Stempel >FIREFRAMEi m a g i n g [||/\/\/\/\//\/|| Ken Sinclair RBP, FBPA. [|| ||-| Applied Photographic Services [|| || | Lethbridge, [|| || | Alberta, Canada, [|| ||-| (403) 381-1654. [||\/\/\/\//\/\|| photo1@telusplanet.net _0___________0______ |___________________ | O