Canon versus Nikon

I actually thought if was a rather stupid idea (and probably is) to put a 2xTC on a 10.5 - I mean really - it DOES sound stupid - but since I try everything, I found that it is actually ok - NO vignetting. Not to say that it is a good idea, but then whaever you do different is never a good idea in some ppl's books. I have therefor decided I have to try everything for myself. For the macro lens - the 60mm just didnt get close enough - I like tiny tiny things (amphipods) and voila! it worked!