The CamFi ZF is a remote controlled zoom and focus unit for timelapse and macro focus stacking
Focus stacking for macro photography using Helicon Focus
Focus stacking - Wikipedia
Amazon.com: CamFi 3 Plus DSLR Wireless Camera Remote Controller, WiFi and 4G High Speed Capture and Transmit Aperture, Shutter, ISO, Live View,Focus Stacking, Support CP1 LR : Electronics
4 Things You Should Do Before Focus Stacking - Shutterstoppers
How to do Focus Stacking on Android Smartphones | Take better product, macro & landscape photos - YouTube