How Cameras and Lenses Work: An Interactive Guide to Photography Fundamentals

Pictures have always been a meaningful part of the human experience. From the first cave drawings, to sketches and paintings, to modern photography, we've mastered the art of recording what we see.

Cameras and the lenses inside them may seem a little mystifying. In this blog post I'd like to explain not only how they work, but also how adjusting a few tunable parameters can produce fairly different results.

Over the course of this article we'll build a simple camera from first principles. Our first steps will be very modest – we'll simply try to take any picture.