Latest C70 firmware (1.0.8.1) created a problem with IRIS control of Tamron lens
Since I updated the C70, i can no longer change the iris on my Tamron 24-70 lens.Did some troubleshooting: I used the lens with another camera = works fine.Used another lens (Canon 70-200) on the C70 = works fine.How can i downgrade the firmware? I c...