What are the differences between the Dumb Mount, Smart Mount, and the Pro Smart Mount?
The Dumb Mount contains no electronics it only allows for the proper mounting of Canon EF / EF-S lenses. you have to set f-stop (with a Canon camera) and focus manually. The Smart Mount contains electronics that communicate with a controller box that allows for control of f-stop and focus and has an LCD read out of current mode and current f-stop value. The Pro Smart Mount all the features of the Smart Mount, in addition to wireless capabilities and advanced level controls for focus pulling.