| Re: SIGMA 50-500mm f/4-6.3 Hi,
Cameraking have them at £714.95 which appears to be the cheapest. I've not got one or looked before so I have no idea if this is a great price or not. I've ordered from them a couple of times (smaller items though) and found them to be pretty good.
I'm sure you could get a teleconverter for the lens you have. Kenko seem to be the most compatible.
I'm sure some of the Bigma (i think thats what they call that lens) owners will jump in to help here.
TobyH |