Thu Jul 28, 2016 6:15 pm
Are your Canon EF lenses on the BM list of supported EF lenses? If not, they are not going to work.
Also, when you mount the SpeedBooster, make sure the lens release button is returning to its locked position, sometimes it sticks, and lens communication is not engaged.
Also, Try pushing the lens release button to see of the camera resets. Also, yiu must power off the camera before changing lenses on the SB, so the camera can reset communication with the lens (or press the lens release button to cycle the camera). But MFT camera makers recommend truning off the camera when changing lenses, which is always a good idea to protect the sensor too.
Denny Smith
SHA Productions