A process of creating moving or still pictures by observing the radiations by the methods of capturing the live data and storing it on a sensitive medium such as electronic sensors or electromagnetic film can be referred to as photography.
In the storing material an electrical or chemical sensor is activated by the light patterns emitted and obtained in a photographic film. Through a highly sensitive remote camera lens this is usually done.
Functions of a camera
The image forming device is the camera. The recording medium is a photographic film or the electronic image sensors. Nowadays having electronic medium as the storing medium, digital cameras are also available.
By using a lens the exposure of the camera to the outer world is controlled by the amount of time and light which is the basic principle of the camera. We can form an image on a film when there is sufficient light. To obtain a real time original image this raw image can then be developed.
Another type of camera in which not only the still but the total movements are captured is movie camera. With no delay in between them in a sequence of photographs the data are captured which is the basic idea behind the movie camera. Often captured with the voice this forms a moving frame.
Controls of a camera
We have to make sure that we adjust the camera either automatically or manually to ensure that we obtain a clear and sharp photograph. Below are some of its descriptions and the controls.
To ensure that the focus is done so that it satisfies the photographer's wish employed in many of the new digital cameras Auto-focus point is one of the additional camera accessories. Nowadays in the view finder multiple auto focus points are also available.
The adjustments of the iris are what the Aperture can be referred to as. It is otherwise called as the f number. The amount of light that will pass through the lens is denoted by this number. On the depth and the focus of the field the aperture has also known to have some effect.
To bring the desired part or the desired area to the sharpest point possible focus is the adjustment that is made. In some latest digital cameras this is also done automatically although this is usually done manually.
In the digital cameras as it was in the real medium so that the colors that are in the imaging area appear naturally the white balance is a special feature that is used to ensure that the white light is captured.
Shutter speed is the controls over the speed of the shutter with which it opens and closes. In the speeds of milliseconds this is usually available. This is the time of which to the storing medium the light and the imaging medium are exposed.
Measurement of the amounts of the exposure of the light is metering. This is done manually so that according to the photographer's wish the shadow regions and bright light areas are captured.