Optics & Focus
Physical Basis of Optics
Except for certain minor differences, the principles of optics and the use of lenses are the same for film and video. Nearly all principles of optics and optical design are based on a few properties of physics. The two most basic are reflection and refraction. There are a few things we need to know about the basic behavior of light in order to understand the fundamentals of optics.
Aside from lighting sources, most things in the real world do not emit visible light but reflect natural or artificial light. The reflection of light can be roughly categorized into two types of reflection: specular reflection which is defined as light reflected from a smooth surface at a definite angle, and diffuse reflection, ...