Paper safe is a light-tight container for unexposed photographic papers, with an easy open positive closing lid. Parallax With a lens-shutter camera, parallax is the difference between what the viewfinder sees and what the camera records, especially at close distances. This is caused by the separation between the viewfinder and the picture-taking lens. Perforations Regularly and accurately spaced holes punched throughout the length of 35 mm film for still cameras. Pinhole camera is a camera without a lens which uses a very small hole pierced in one end to allow light to pass through and form an image on the back of the camera which can be covered by film.
Pixels are an abbreviation for picture elements.
The tiny squares of light making up the picture are transmitted in digital form and reconstituted as a visual image. Plane is an imaginary straight line on which image points may lie or which passes at right angles through a set of points perpendicular to the optical axis. Polarization is light said to travel in a a wave motion along a straight path, vibrating in all directions. Polarization can be brought about with a polarizing filter which causes light to vibrate in a single plane only. Polarizing filters are used over camera lenses and light sources to reduce or remove specular reflection from the surface of objects.