Georgia State University
Georgia State University: Hyper Physics: Telephoto Lens
At this site from Georgia State University Physics Department the operation of a telephoto lens is discussed. The refraction of light through the lens is shown and a link to a calculation page is provided.
Other
Video 101: Camera Lenses
Video 101 is a fascinating introduction to television production--an impressive collection of engaging, interactive lessons with plenty of example video clips to explain concepts. This chapter on Camera Lenses examines telephoto and wide...