I'm thinking of buying this lens but not sure of it's performance with 1.4 X & 2X TC,s. This shot of the Heron ( Image 8715) seems out of focus or is it Camera shake?
The Sigma doesn't come with Image Stabilization given that the photo was taken
at 1/5000s at F4 ISO 200 this should have been fast enough to freeze the motion.
So why does this shot look blurred?
