I can offer you 300mm 2x tele on a 1dmkiin if thats any help
Kipax, if you cover the postage both ways (RMSD) you can give my 2xmk2 TC a try out or if your in north sheffield pop in and try it out.
Mark
Kipax if you like it and decide to buy I have a Canon one sat here doing nothing so make me an offer on it ! (2x that is )
is it a mk2 ?
I think so !