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• Photoflood lamp - it is likewise known as reflectorized light or spotlight
• Photos and graphs - the word photography is derived from the greek word
• Telephoto lens - these lens has a focal length longer than the diagonal of the film frame of image sensor
• Positive lens - it has a focal length and bend the race together which makes it a converging lens
• Telephoto zoom - this type of zoom is popular with a sports and wildlife photographers
• Negative lens - a concave lens characterized by the fact that is thinner in the middle than the edge and forms a virtual image on the same side of the lens
• Chromatic aberration - it is inability of the lens to focus all colors in the same place
• Spherical aberration - a lens detect wherein the photographic rays passing through the edges refract more sharply than those passing through the central part of the lens
• Pincoshion distortion - there are straight line near the edge of the frame bow towards the center of the frame
• Sir David Brewster - He invented the optical system of the future parlor stereoscope