As a popular hobby for the past 160 years, one feature that has remained constant in photography is the need for the camera to be loaded with a ‘film' that needs chemical processing. Now, with the development of the charge coupled device (CCD), which converts light into digital electronic signals as an image, the age of traditional photographic film usage is coming to an end.
[...] digital images into an album on a personal computer (PC). Certain printers can directly be linked to the digital camera for making prints. Once this versatile piece of equipment is attached to a PC, one can open a world of photographic and artistic possibilities. From the outside, cameras generally resemble normal film-based ones. There is a lens, a viewfinder, a shutter release button and a flash. However, what is different is the back of the camera which has a small, flat CCD panel which converts the received light into digital electronic data. [...]
[...] This is so because, while an optical zoom focuses a part of the subject on the whole of the CCD and records more information about that part of the subject, a digital zoom only enlarges a small part of the CCD image without recording more information. So, the more one zooms in on a subject in the digital mode, the lens information there is available and this results in a lower- resolution image. On the whole, a digital zoom is not very useful. [...]
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