I cant stop the lens down - its works at 2.8 but no other appeture on Canon 7d Mkii or canon 60d - anyone know how to update the firmware and where can I get a copy of the firmware ?
Tue, 19 Nov 2019 17:13:51 -0800
That's a good question. In the past, you have the send the lens to Sigma to have the firmware updated. I don't know if there is anyway you can do it yourself.
Tue, 19 Nov 2019 17:26:18 -0800
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