I was wondering if anybody knows if the 645 lens Mamiya 70-150m.m.zoom can be used with Mamiya x2 teleconverter. A person want to sell me it and said he have been using it with the teleconverter. I don't know this lens, I think it is in the older range since it doesn't appear on the recent Mamiya webpage, and they say on the webpage the new lenses are not compatible with a teleconverter.

Thanks for any help on this issue!