cjc2 wrote:
I also have that lens and have not had that issue. Given the length of Sigma's warranty, I would think that your lens could NOT be out-of-warranty as you say. I would strongly suggest you contact Sigma and discuss with them. They might even offer to make the repair without any cost, other than shipping to them, even if it IS out of warranty. You never know until you ask!
I agree, the Sigma Sport was not available until Oct. 2014, unless the warranty terms are different in Australia, it should be under warranty until at least Oct. 2018.