Anyone us the 70-200 2.8 II on the C70 witht he Canon Speedbooster? I'm seeing a lot of vignetting, even after updating the firmware of both camera and adapter.
I don't think it is a deal-breaker for me. Just wondering if others are seeing it.
Does the peripheral illumination correction have to be toggled on? I know the canon speedboater "fully" supports the 70-200 II, so I assumed it would be on by default...
