Originally posted by jbrowning Hello banep
Yes my lens has the EX mark on it.
I'm assuming the firmware update would have to be done by Sigma?
When they updated yours, do you happen to remember how long it took them? I have evening barrel races every other Friday and this is my go to lens for them.
Thank you for your time.
Jim
Yes, it have to be done by official Sigma service representative.
Maybe it is different procedure in US but in small European country it went like this:
I asked for firmware update by email and when they confirmed "ok, send it" I sent lens to official Sigma service representative in my country.
After that Sigma representative sent that lens to Sigma Europe, but not immediately. Because that kind of servicing is free and this is a small country they are collecting lenses for a certain period of time, around 2 weeks, and they sent all those lenses for free servicing as one package to Sigma Europe. Round trip plus servicing time was another 2 weeks so I pickup my lens 1 month after I sent it to service.