Yeah Brian i know ? the https://www.dzofilm.com/linglung.php should work ok ? http://www.3alitytechnica.com/support/documents/PERIPHERALS/SPC7000_in-production.pdf this seems to be what im looking for but wayyyyyy over my budget.
Afraid i need to grab my good old arduino were i made a wireless follow focus 11 years ago ?
but still need to find a good servo motor that is not so big or are there any open source lens motors that can be controlled via arduino ?
thx janosch