3D printed lens from Witono

Witono wrote me:

Just want to share my 3D printing project during lockdown.

The lens is designed for the EF mount full frame. To use on m4/3, I used a Viltrox 0.71x focal reducer. In most cases, the focal reducer does not produce a sharper image as opposed to the advertising claims. But in this case, I noticed that the image produced with a focal reducer did produce a slightly sharper image.

Hope you enjoy watching this project as much as I making it.