Arduino Follow-Focus System for DSLRs

After building himself a camera dolly, Adi Soffer found it was difficult to manipulate the focus control of the camera, so he built this focus pulling system around an Arduino and a servo-actuated lens ring. Thankfully, he documented everything (documentation is everything, y’all) and shared it with the world. You can read parts 1, 2, 3, 4, and 5 of his build adventure on his blog. Of the last part, he writes:

First of all I have ordered some Atmega chips to create a smaller, more professional version, and am also working on a more aesthetic and handy configuration for the whole thing. I have a most generous friend who’s helping me out with designing a custom box for the whole thing – actually something that is a far cry from the “box” I’ve used for now. Check out her blog and her beautiful works here.

I’m also doing some research about stepper motors which are more silent and could have a higher resolution. Although “staircase” effect is not visible with this particular lens, I think it may pop up later on with different lenses and slower pulling. Of course stepper motors are a whole different ball game in terms of coding so I’m really trying to figure out as much as I can before jumping in. Any thoughts are more than welcome.

Nice job, Adi — excellent documentation and cool project!



Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 32,000+ makers on Adafruit’s Discord channels and be part of the community!

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more

CircuitPython – The easiest way to program microcontrollers –

Maker Business — Foxconn executive discusses the dramatically scaled back project in Wisconsin

Wearables — Flex your mind, flex your circuit board

Electronics — Damp Sponge vs Drenched Sponge

Python for Microcontrollers — Python on Microcontrollers Newsletter: New CircuitPython and MicroPython Minor Updates and More! #Python #CircuitPython @micropython @ThePSF

Adafruit IoT Monthly — eInk Postcard, VR Spectrum Instrumentation, and more!

Microsoft MakeCode — MakeCode Thank You!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — JP’s Product Pick of the Week 6/28/22 USB/DC/Solar LiPo Charger bq24074 @adafruit @johnedgarpark #adafruit #newproductpick

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at !

1 Comment

  1. Hey guys, this is great, thank you very much!
    (and what a great way to check I’m human!)

Sorry, the comment form is closed at this time.