
I have got it, on my Nikon, No problems. They are all high quality lenses, Tokina, Canon, Sigma wide angles have been around for a while and been extensively tested. They are all slightly different performance wise, ones weakness is another lens strength. The camera you use has to be taken into account, the D300 for example has got rid of chromatic abberation to a huge extend within its processing. If price is part of the selection criteria, the Sigma is hard to beat.