Hello Jao,
As edelkrone, we accept the fact that the focus one Pro, when used simultaneously with some matte boxes, especially ones with larger frames may result in some incompatibilities for the use. We regret not being able to offer
doughnut lens gears; however obtaining 3rd party doughnut gears for your lens will solve this incompatibility.
Additionally, the edelkrone follow focuses (focus one pro and focus plus) require lens gears (Please see
http://www.edelkrone.com/e-store/28-ede ... 80255.html) which are 0.8 pitch, to function smoothly; otherwise you will not be able to operate with our follow focuses. The edelkrone lens gears are specially designed to work simultaneously with our follow focuses in order to adapt and run smoothly with any lens, regardless of its size and brand. Furthermore, the edelkrone lens gears are a one size fits all, and you will not need various types of specialized lens gears for each of the different lenses you own.
To sum it up, in relation to its
reasonable price, whip/crank port, one of a kind focus marker and reverse gear option, we believe that we are offering the best solution to our customers.
Please do not hesitate to contact us at
info@edelkrone.com any time for further information.
Best Regards
edelkrone Customer Support