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factfile3.5 Digital Cameras 2 : SLR


Single Lens Reflex (SLR) digital cameras

Single-lens reflex cameras, which like compacts can also be digital or film format, are increasingly used by professional as well as serious amateur photographers. They are often referred to as SLRs or DSLRs (i.e. Digital SLRs).

Unlike compact cameras, their lenses can be removed, allowing a wide range of interchangeable professional lenses to be attached. In a single-lens reflex camera the light from the object reflects from a mirror and is taken through the viewfinder to the eye of the photographer, so that what is seen in the viewfinder is exactly what will be recorded on the image. Compared to most fixed-lens compact cameras, SLR lenses permit photographs to be taken in lower light conditions without flash and to have a greater range of technical options. There is no shutter lag, so these cameras are ideal for action shots. They tend to be significantly more expensive than compacts.

Digital SLR

In earlier models of DSLRs when the shutter was open during exposure, the mirror flipped up out of the light path to uncover the electronic sensor or CCD. As a result the LCD on DSLR cameras could not show the image while users composed a shot. For the same reason, they could not be used to take video clips. However, some newer models now have full HD movie recording and a 'live view' LCD screen that allows you to compose your photo via the LCD screen just like compact cameras. The more sophisticated technology is reflected in the cost.

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