Cameras
Reviewing some of the basics of optical imaging systems helps
reveal some of the implicit assumptions often made in producing images with
computer graphics.
Ideal pinhole camera
Real pinhole camera
Aperture with a lens system
Why is depth-of-field limited?
Camera Elements
The 'aperture' of a
lens is the diameter of the lens opening divided by the focal length of the
lens. For a typical 50mm lens, the aperture may range from f/2 (large aperture)
to f/22 (small aperture). The aperture will determine the depth of field of the
resulting image.