A fundamental part of photography is focusing light onto the recording medium, be it film, digital sensor, or even our own retinas. And the method used for doing this the vast majority of the time is a lens, a transparent substance with a certain index of refraction – the trait of bending light when it passes through the surface of the substance. Put the right correct surface angle
Tag: barrel distortion
On composition, part 16: Focal length
Focal length. Some people consider it the “zoom” of a camera. It’s expressed, though not really explained, by the numbers on the lens that say “18-55mm” or some such. Essentially, it determines how close the subject appears, the magnification or lack thereof. There are, naturally, the obvious aspects of using focal length in composition –