It's Sigma, not Stigma:
http://dictionary.reference.com/browse/stigma
What sort of things do you want to take photos of?


It seems to be the lens that many Nikon shooters want from the Canon range and within Canon circles, it's very popular indeed I can't zoom in far enought with the 55-250. If I want to zoom in further im going to need to spend some money, something around £200-£300.
let me know your thoughts
for 300 quid you could probably pick up a sigma 170 - 500mm APO DG but make sure it is the DG version and not just APO
the non DG version will l only work wide open on a digital body so that bit is pretty important
i owned one of these for a while and there good up to around 425mm after that they go a little soft but not to such an extent the photo's are unusable but it's noticable
the usual place fro these would be ebay , gumtree or pre loved
The 170-500 are the cheapest for what i need but am I better off spending a bit more and getting maybe a 150-500/50-500??