A camera or camera is a device used to capture images or photographs. It is an ancient mechanism for projecting images on the object, in which an entire room played the same functions as an actual camera inside, except that in those days there was no possibility to save the image unless it be drawn manually . The current cameras can be sensitive to the visible spectrum or other portions of the electromagnetic spectrum, its main use is to capture the image in the visual field.
The cameras consist of a closed dark room, with an opening at one end so you can get light, and a flat surface forming the image or display to capture the light at the other end. Most cameras have a lens placed in front of the camera aperture to control the incoming light and focus the image, or part of the image. The diameter of this opening usually modified with a diaphragm, but some cameras have a fixed aperture.
While the size of the aperture and the brightness of the scene control the amount of light entering per unit time in the camera during the photographic process, the shutter controls the time that the light hits the recording surface. For example, in low light, the shutter speed will be lower (higher open time) to allow the film to receive the amount of light needed exactly.
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Despite the technical advances of modern SLR cameras today, the basic process by which a negative impression to form a copy of reality remains the same despite modern queA technical developments in modern SLRs day, the basic process by which a negative impression to form a copy of reality remains the same as the first cameras. In essence, the camera is a dark box with a hole through which enters the light reflected by the object on a photograph to capture negative chemical process producing almost instantaneous. Silver halides react to negative light into tiny dots. Areas that receive more light appear darker since it has formed a greater number of crystals, while most whites are the least impressed. This process results in a negative image, ie with the colors reversed. Should be positive by revealed for the final copy with the original colors. The cameras have three basic control mechanisms to regulate this process and obtain a sharp and correctly exposed picture: in the first chambers.
In essence, the camera is a dark box with a hole through which enters the light reflected by the object on a photograph to capture negative chemical process producing almost instantaneous. Silver halides react to negative light into tiny dots. Areas that receive more light appear darker since it has formed a greater number of crystals, while most whites are the least impressed. This process results in a negative image, ie with the colors reversed. Should be positive by revealed for the final copy with the original colors. The cameras have three basic control mechanisms to regulate this process and obtain a sharp and correctly exposed photo:
1 .- The focus ring: Located on the target. Turning it modify the distance between the lens and film plane. This way we bring into focus the object photographed, which might otherwise leave to form his image blurred on a plane before or after the movie.
2 .- The diaphragm is the hole through which light enters. The SLR is a ring formed by a foil that varies the diameter of the aperture and thus regulate the amount of incoming light.It is operated by turning the other ring on the lens.
3 .- The Shutter: When you press the shutter button are triggering the shutter. Usually two blinds on the front of the negative that open and close for a split second. The shutter controls the time during which the film will be impressed.
material out of the page: http://www.desarrollomultimedia.es/articulos/funcionamiento-basico-camara-fotografica.html
Captured images can be viewed on any computer, Mac or PC that has an image editor or a web browser. There are two options for storing pictures:Through the camera's internal memory to the disadvantage of the saturation of the memory, which should be emptied into the computer if required to continue taking photos.Storage removable memory cards, which become the "rolls" of digital cameras, storage capacity is measured in megabytes, as well as computer files, and convert each image taken in a graphic file extension . jpg. Some of the most commonly used are:
Star Media Cards: These are small flash memory modules, some cameras come with one of these cards and according to the needs of memory upgrade, can buy additional ones. The sizes are 4, 8, 16, 32 and 64 megabytes (MB).
Compact Flash Cards: Its characteristic is similar to the Star Media but what are their ranges of varying capacity are up to 128 megabytes (MB).
One more option diskettes are 3 / 4 in some cameras. The disadvantages of this equipment, in addition to its technological gap is that they provide a quality less than 1 mp, and the storage capacity of floppy disks is very limited: no more than 5 photos.
Other forms of storage of digital cameras are USB ports. If you want to transfer images from camera to computer, it must have a USB port (also called universal port, because through them you can connect printers, scanners, mice, tables, any peripheral of a PC).
Depending on the brand, you can find cards with different storage capacity. Which is better? The answer depends on the needs and tastes of the user, the only thing to keep in mind is that when you travel is important to have enough cards, because while a roll of pictures you can buy virtually any store, only memory cards are sold in specialized sites.
Storage Format
As for the type of formats that can be used for storing digital images are: PCX, TIFF, JPG, GIF, and none of them is the best because they have different purpose. The. Jpg is compressed and the picture does lose some quality to overcome this problem, you should buy memory cards that support the format. Tiff always except for being compressed can only store a maximum of 10 pictures on each memory card and depending on the quantity of MB that can handle.
How to Transfer?
Most cameras have ability to connect directly to your computer via a USB cable or through a FireWire connection. The drawback of this procedure is that the image transfer will be slow and spending too much battery. To resolve this, some users prefer to use a film reader, are devices that can connect to a USB or FireWire port on the computer for which you must follow the following steps:
Remove the memory card digital camera film
Inserted into the digital film reader
Transferring images
There are other similar devices to a base which is inserted in the camera and the touch of a button, automatically download images via a USB connection to computer.
material out of the page: http://www.ciberhabitat.gob.mx/medios/camaras/funcionamiento.htm
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