gawler wrote:
thanks mate , yes i have , the 1x4 good and love the 120-300 f2.8 , but my sigma 2x does not fit well to the body , i have been thinking that this is what may be the problem as its been that way since new ,might take it back to the camera store or buy the canon 2x , if i run the 2x on foCal it cames up lens failed to focus 4 or 5 times per test so i think its not conecting with the body properley , but if any one has any surgestions glad to try them lol , thanks again Ramled
I also use this lens with my 7D and I have tried the Canon extender but with this lens I am much happier with the results of the Sigma extender(in my opinion it has sharper focus and better image quality).