PHOTOGRAPHY TERMINOLOGY-IMP ONES.

THERE ARE MORE PRACTICAL WORDS WHICH WE find regular in use...BUT THE TERMS ARE SO MANY THAT A BEGINNER OR AN ENTHUSIAST MAY FIND IT DIFFICULT TO DIGEST THEM: For reference it is necessary to note down and consult when required:
-Hyperfocal Distance: The distance of the nearest object which is imaged with satisfactory sharpness when a lens is focused at infinity. When the lens is focused on hyper focal all object from one-half that distance to infinity will be sharp.
-Illustrative photography: A type of photography intended to illustrate text or to tell a story without textual supplement other than captions.
-Image: A reproduction of an original object or scene by a lens The image which enables us to see is formed within the eye by the crystalline lens.
-Industrial Photography: The photographs shot for the industrial firms, usually for publicity, training or advertising purposes.
-Infinity: Infinite distance in practical photography, that distance beyond which no adjustment is necessary in focusing the lens. For slow lenses it is usually 100 feet, for modern high speed , short focal length lenses, it is usually 500ft and for long focus lenses about 3000ft..
--The photograph above is of a CD taken under a tubelight.