Samyang 800mm motorized focus
thingiverse
This is my attempt to create motorized focus for my Samyang 800mm+2x Tele - Work In Progress It uses 28byj-48 stepper motor modified to bipolar for use with stepper sticks and arduino. So far it works with arduino stepper board and simple firmware that receives command via serial port. In first step I plan to create custom PCB(arduino, stepper driver, encoder+button, LCD and connectors for UART, SPI (for Cannon EF interface) and +12V DC supply) Second goal is to create firmware for it to steer it manually, with Canon EF connector and maybe via WIFI using esp8266 via UART connector. Example video-clip: https://photos.app.goo.gl/sDPRkntDqvp3ncZN9
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