Has anyone on this site tried the OS version of the sigma 50-500.I had a brief go of it and it seemed to work pretty well. OS seemedvery good and AF was very fast.There was a bluish cast to some of the images on the 500 end but I have been led to believe that this would be fixed with a UV filter.


I have never tried the 100-400, but have seen examples of how good the image quality is by users of this site.


In Australia we mainly get to read about 10 different UK based photographymagazines if we choose to. Even the magazine devoted solely to Canon users rates the new Sigma very highly, higher than the rest.


Ihave used the Canon 500 f4and loved the length but not the price tag.


At this stageI am leaning towards the 50-500, but would prefer an updated 100-400, but that may never happen.


Your input and opinions on the two big zooms would be appreciated.


Steve