After shooting this lens for 4 or 5 years, mine is starting to have some focusing issues. I use this quite a bit, so I'm not too bothered that it needs to be serviced.
I see that I can send it to Sigma Corp's US Service Department in Ronkonkoma, NY, or one of their authorized repair partners. The closest one to me is C.R.I.S. in Chandler, AZ.
Does anyone have any experience sending Sigmas in for service? Should I go for the Sigma shop, or the closer authorized shop?
Shipping from Utah.