Yesterday, I tested simple EF lens aperture control.

A couple of days ago, I ordered a cheap EF mount macro extension tube set and it is delivered yesterday. I wanted to make one of them as EF lens contacts extension. Most of parts are made out of plastic and I needed to handle carefully.

After a couple of hours work, it is modified as EF Lens contact extension base.

 

I used this for EF lens aperture control test with Arduino.

It is just simple aperture control test. It was not about setting accurate certain F number yet. I need to research how to do that.