Nikon D3400 Autofocus Replacement Hack (55mm lens)

thingiverse

Autofocus motor burned out. So I got mad. The Nikon D3400 stock lens usually comes with purely electronic focus.. which means that if your internal stepper motor burns out, you have no way of focusing whatsoever. This is a design flaw! Those tiny stepper motors are also hard to find. With this hack you gain the ability to control autofocus using Arduino which then opens the door to other possibilities! (More updates to come..) Make sure you've fully disassembled the lens before you drill the holes. This includes removing the front fisheye lens so it doesn't get scratched! 3 little screws located behind the circular sticker label. (I didn't and so I accidentally scratched the edges of my own lens with my drill, but it's not a visible flaw as it doesn't get picked up by the sensor.) The holes can only be drilled exactly where you see in the video. A fishing line is then looped through the focus lens. You'll have to tinker a little, as long as you're careful.. but it can be done. The lens stepper motor will also have to be unsoldered. This is ideally printed with a horizontal expansion of -0.1 or -0.2 if you can't get it to fit. But it also needs to be tight. https://www.youtube.com/watch?v=GoQo3BZWUH0