« on: September 30, 2014, 11:06:57 PM »
I found it difficult to magnify them much, they seemed to me to lack quality compared to my 100-400L.
Since they are advertising photos, probably taken with great care at f/8 and likely hundreds of images were taken to get the three, I'd expect to see every hair in sharp focus. They should easily beat my photo from my 100-400 at 400mm and cropped at f/8
They're full size images; go to Download -> View All Sizes and you can see the full size originals. It looks brutally sharp to me at 600 f7.1 in that hippo shot.
I tried that on the deer, the highlights had a lot of halos, and the hair looked over sharpened. Still, it did look good for the price. Its more what I had expected.