Solution 2] Shomei problem

This is a continuation of my previous post.

What would the image look like if 1 coaxial lighting were used?

Coaxial lighting is also called coaxial epi-illumination,

The light shines parallel (90 degrees) to the camera.

The lens cap is so slippery where it rubs against the lens cap,

What happens to that rubbing area?

You can kind of imagine, can't you?