That review you posted up is quite old, and in many cases the reviews go way back to 2008.. There have been many versions of this lens since then, in fact the image on that forum is just about the first version... It was not that great back then... The lens has come a long way since the first version.. If you are going to use a review it really needs to be a more current one, no more than a year.. If you did that with some of the Canon and Nikon lenses, you would see big difference in some of the most common lens reviews during its continued development and improvements over a period of 5 years..
10,000 image and all of them a keeper.!!. That's quite extraordinary..!! I have read and viewed so many videos of world renowned photographers and been to some exclusive forums in the city too, all of which the photographers suggest it is very common to capture many photos but only a small percentage of them are keepers..
Destiny, if you are unable to read my english well, so be it. But I would like to ask you to try a bit harder.
I wrote "Every photo needs to be a keeper", I did not say every photo is. The percentage of keepers needs to be as high as possible. To achieve that I use f 2.8 lenses, not something like the Bigma, the people I work for would send me away or at least not hire me again.
Of course, I can imagine situations were the definition of what is a keeper will be different. In terms of photos of marathon runners we are talking about sharp/in focus and closely cropped, preferably full body shot and eyes open and visible. Yes it is not an easy task but fortunately I use the right lens for it....
The reviews I refered to have a last comment of Jun 30, 2012.
If you don't like the reviews I came up with it would look much better if you came up with something more recent yourself. Remarkable that so far you seem unable to do so. Looks almost like they do not exist......