Shooting portraits in natural light is a lot harder than it looks. It can be even more of a challenge if you’re capturing swimwear or boudoir portraits outdoors using only sunlight.

We often refer to French optical specialist Mathieu as a “weird Lens guru” because he always has a few oddball tricks up his sleeve. Sometimes his videos are about adapting cheap vintage lenses to modern digital cameras, while other times he reveals a fun-and-wacky DYI project.