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Capturing a moment in time is the essential function of a camera, but there are many other uses for cameras as well, especially digital cameras. For example, have you ever thought of using the LCD screen on your digital camera as a flashlight? How about letting your camera act like binoculars by zooming in on a far-away object? Here... more »
Collecting vintage cameras has become more popular in recent years, especially as digital cameras have replaced film cameras in most homes as the first choice for family and holiday snapshots. Collectors should follow a few simple guidelines when considering vintage cameras, whether they are collecting for fun or hoping to find... more »
Setting up and using an Internet camera is easy. With a basic USB web camera and the proper software, broadcasting via the Internet is a good way to add a face to voice and text communication. Internet cameras are generally used in conjunction with popular instant messaging and voice chat systems like Yahoo Chat, ICQ, AOL Messenger,... more »
Video cameras may make people act nervous or different. If you want to capture true moments from the babysitter, for surveillance, or just general interest, then you should consider getting a spy camera. There are stable spy cameras that can be wired into homes, but there are also spy cameras for on the go adventures. You can catch... more »
The parts of the simplest possible camera are a dark box with a small hole or window and some photographic medium on the inside back wall for recording the image. For everyday cameras, the dark box is replaced by a camera body. The window--technically called the aperture--is covered with a ground-glass lens for focusing the light that... more »
Looking for a new camera? Whether you're a pro, hobbyist or snap 'n shoot shutterbug, you're in...
Take that prize-winning picture with high-quality lenses. Avoid disrupting a shot by shooting at...
Where would the dinner-and-a-movie be without video cameras? Whether you’re taping your child’s...
Learn all about getting the perfect shot with SLR cameras. These guides focus on SLR cameras and...
Digital cameras are not all created equal. If you are shopping for one, it's important to compare features and abilities to make the right choice.... more »
When looking to purchase a digital camera, your best bet might be to purchase one on the Internet. Some Internet sites offer good deals and are... more »
Nikon is one of the leading camera manufacturers in the world, and produces both film and digital cameras. The company is known for their... more »
Photography is becoming more and more popular today, thanks to the advanced cameras that companies are making. One of the most popular camera... more »
Old cameras work using a special thin strip of film. The film is treated with a special light sensitive chemical that works by causing a chemical... more »
Surveillance cameras have a variety of uses and applications. Though surveillance cameras have many positive uses, critics also point out the... more »
Security footage is vital to home and business protection. Not only can security cameras help prevent and catch criminal acts, but breakthroughs... more »
Antique cameras bring about a sense of nostalgia like nothing else. From the portrait plates and floor standing cameras of the Old West to the... more »
Humans as a species have very poor night vision, especially compared to other mammals. The eyes can only process a small portion of the... more »
You just bought your digital camera and took your first pictures. Now you have to get your pictures off your camera and into your computer. This... more »
Before purchasing your first digital camera, there are a number of advantages and disadvantages to consider, from price to features, size and... more »
Because cameras have very sensitive parts and chips and can be damaged easily, they require careful handling. Always insert your hand into the... more »
People often wonder why feature films look so much better than their home videos. The reason for this is that the cameras used to shoot movies are... more »
Security cameras are a wonderful security tool used for many different applications. Just about everywhere you go in a major city, there's going... more »
Every year, millions of different movies, television shows, Internet broadcasts and other types of film and video productions are produced. The... more »
If you have a digital camera to sell, you can maximize your profits and put them toward the purchase of a new camera. You can sell your digital... more »
There are a number of professional photographic cameras. From small, portable 35 mm cameras to large format studio cameras, each camera serves a... more »
The body of a disposable camera is a modern variant of the old "box camera" concept introduced by Kodak. Box cameras were made to be inexpensive... more »
Digital cameras come in a wide variety of brands and price ranges, and have many different features to choose from. All of these options can make... more »
The first cameras allowed people to take limited views of the local landscape. The panoramic camera, with lenses that can rotate from 110 to 360... more »
Cameras from Large to Small, Film to Digital
A camera is a device that records images, either as a still photograph or as moving images known as videos or movies. The term comes from the camera obscura (Latin for "dark chamber"), an early mechanism of projecting images where an entire room functioned as a real-time imaging system; the modern camera evolved from the camera obscura.
Cameras may work with the light of the visible spectrum or with other portions of the electromagnetic spectrum. A camera generally consists of an enclosed hollow with an opening (aperture) at one end for light to enter, and a recording or viewing surface for capturing the light at the other end. A majority of cameras have a lens positioned in front of the cameras opening to gather the incoming light and focus all or part of the image on the recording surface. The diameter of the aperture is often controlled by a diaphragm mechanism, but some cameras have a fixed-size aperture.
A typical still camera takes one photo each time the user presses the shutter button.
A typical movie camera continuously takes 24 film frames per second as long as the user holds down the shutter button.
History
The forerunner to the camera was the camera obscura. The camera obscura is an instrument consisting of a darkened chamber or box, into which light is admitted through a convex lens, forming an image of external objects on a surface of paper or glass, etc., placed at the focus of the lens.Oxford English Dictionary. The camera obscura was described by the Arabic scientist Ibn al-Haytham (Alhazen) in his Book of Optics (1015–1021)."Alhazen">Nicholas J. Wade, Stanley Finger (2001), "The eye as an optical instrument: from camera obscura to Helmholtzs perspective", Perception 30 (10), p. 1157 – 1177. Alhazens work appeared in Latin translation as De Aspectibus ("Concerning vision") in about 1200, and the book influenced Roger Bacons reflections on producing images using pin read more at » http://en.wikipedia.org/wiki/Camera
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