Depth Of field

In photography one of the most important thing we should concider is Depth of field.When a particular subject is recorded on photographic media, some other entities present in front and at the back of the main subject are also recorded apparently sharp.The subject range that renders apparently
sharp on photographic media is know as the depth of field.This is based on the smallest entity that human eye can resolve - known as the circle of confusion.

There are three main parameters available to the photographer to control depth of field.

• The iris diameter of aperture. As the iris diameter reduces, the viewing angle of the light cone also is restricted, in creasing the DOF.
• The subject distance. Similarly increased subject distance also makes the projected angle on the lens narrower, increasing DOF.
• The focal-length of the lens used. Since shorter focal-length looks at a wider angle (large no. of picture elements), per element projected angle is narrower.

Shallow depth of field

Only the foreground is in focus.

Great depth of field

The image is in focus from the

foreground to the background.

Portrait Photography

Simply portraiture(Portrait photography) is photography of single person or group of people that displays the expression, personality, and mood of the subject. Like other types of portraiture, the focus of the photograph is usually the person's face and the required part of the face which we want to expose the feeling, although the entire body and the background or context may be included.

Wide angle Photography

Wide angle photography uses to expose large rage of area. For that wide angle lenses are very essential.In photography and cinematography, a wide-angle lens refers to a lens whose focal length is substantially smaller than the focal length of a normal lens for a given film plane

Macro Photography

Macro is extreme close-up photography, usually of very small subjects, in which the size of the subject in the photograph is greater than life size (though macrophotography technically refers to the art of making very large photographs). By some definitions, a macro photograph is one in which the size of the subject on the negative or image sensor is life size or greater. However in other uses it refers to a finished photograph of a subject at greater than life size.