"I've owned this lens for two weeks and couldn't be happier. I've shot images of dogs running full speed and the focus keeps up with them. I've also shot some humans at 150mm @1/30th sec. and they are as sharp as could be. I am 100% happy with this lens."
"The lens is an absolutely superb macro lens, razor-sharp, excellent contrast, no CA, a nice, very functional tripod collar that is easily adjusted or removed. Build quality is excellent too. The lens has a very sturdy feel to it, really feels like a piece of professional equipment."
"If you want the best possible lens at this focal length then this is the best money can buy. I think from a value perspective this lens with the various tele-converters give you the most coverage and value for the money. I do also shoot a 70-200mm f/2.8 with and without the tele-converters with very good results, however the sharpness with this lens as expected is beyond comparison."