Hi all,

I've recently upgraded to a Canon 5Ds and loving the resolution, however I've noticed photos with my 70-200 2.8L non IS aren't as sharp as they used to look. I'm guessing it's the higher resolution in the sensor mixed with slight camera shake.

I've got the Tamron 24-70 2.8 VC and it seems ok so far, do you think if I upgraded to the IS version of the 70-200 I should notice an improvement or should I perhaps look at another lens?

On screen the pics look crisp, but I had some blown up of my grandfather in an ANZAC day march and his face was blurry at larger sizes whereas my landscapes on the 24-70 at 10x18 inches look crisp (enough) all the way through.