I currently have the Sigma 50-500mm, and lately I have been looking at selling this and getting the Canon 100-400 L IS lens.
I have looked at many reviews and have gotten the impression that the Canon will give sharper results, I also know its a lot lighter!
The main thing I was wondering is whether it would really be worth upgrading to the Canon? To me the option of IS is very promising
Just wondered if anyone has tried both lenses and knows how much of a difference the IS will make?
[I take a lot of pictures of birds in flight, so I don't use the tripod all that much!]
Thanks!
Nikki