Digital Cameras, A Brief Introduction
Steven Sasson's patent

When I first ready this article on digital cameras, I thought it would be a good fit for my blog.  Not everyone really understands digital camera technology.  While it doesn’t go into too much detail, the article does provide a good overview of digital cameras, in its simplest.

One of the latest exciting innovations of this century is digital camera. The word camera is taken form a Latin word “camera obscura” which means “dark chamber. During the past, film cameras were mainly used to take pictures. The first digital camera was invented by Steven Sasson in 1975.

digital-cameras
Steven Sasson’s patent

Digital cameras are normally used to capture still picture or take videos through the use of an electronic image sensor. An optical system is built inside the camera which uses a variable length camera lens which is mainly used to focus light on the image capturing device. The length of the diaphragm and the shutter controls how much amount of the light will be utilized. In digital camera, the image capturing device is an electronic device whereas a chemical device was used in normal old age film cameras. Modern digital cameras have several amazing features which has made them become so popular in these days. There are many types of digital cameras which are available in the market such as the point & shoot, advanced point & shoot, SLR, mirror less etc. Sony, Canon, Panasonic and Nikon are just some examples of the best digital camera manufacturers in today’s market.

The concept of pixel, the smallest unit of a digital image, and resolution is used in digital camera. The more number of pixels means higher resolution that creates a more high quality image. The normal digital cameras available in the market has resolution around 20.1, 16.1, 14.1 megapixel.

Image stabilization is another exciting feature of modern digital cameras. Sometimes an unintended movement of hand at the time of clicking the picture makes the picture blurry. Image stabilization feature is used to reduce the blurry effect & makes it clearer. It is an electrical process whereas some manufacturers call this feature the anti-shake technology. However the image stabilization feature will not remove the blurry noise caused by movement of subject. This problem can be eliminated by faster stutter speed.

Zoom is yet another important feature of a digital camera which has made a huge difference between digital camera and normal film camera. Zoom is used to get close look of the subject when they are physically far. Digital camera may have either optical zoom or digital zoom. Some digital cameras have both. Optical zoom uses the lens which magnifies the images and brings the subject closer to the photographer. The image quality will not deteriorate while using optical zoom. On other hand the digital zoom is an electronic process which crops the image and enlarges it to make it closer but it may reduce the quality of the picture.

Another importance aspect of digital cameras is the ISO. It refers to the sensitivity of the image sensor to light. A higher ISO requires more light. Most of the low-end SLR’s will have ISO range from 100 to 1600 where as expensive cameras may have ISO 3200, 6400. There are several other features which are associated with digital camera such as auto-focus, red-eye correction, white balance, noise reduction, shooting, various scene modes among others. Various types of camera lens can also be attached with the camera to experience better quality. Digital cameras has indeed revolutionized the world of photography.

– Harvey Norman

Harvey Norman Singapore offers a wide range of top brand digital cameras and camcorders for your photographic and video recording needs. From compact cameras, DSLRs and Hybrid cameras to outdoor, waterproof action digital cameras, including the latest with Wi-Fi technology.

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