How a Fresnel Lens Works, Explained with a Simple Blackboard Model
If you’ve heard of Fresnel lenses in photography before but have no idea what they are or how they work, here’s a fantastic short primer. In this 3.5-minute video, physicist David G. Willey (AKA the Mad Scientist) explains the science behind the lens style using a simple and easy-to-understand model on a blackboard. Willey is […] petapixel.com »