Wednesday, June 10, 2009

Types of Camera Filter


There are many types of camera filters, each with their own set of purposes.
1. Ultraviolet (UV) filters absorb ultraviolet light. Ultraviolet is invisible light, and film cameras are more sensitive to it than digital cameras. At elevated locations, ultraviolet light is particularly dense; this density is due to the thin atmospheric layer.UV light produces haze that can cause photo details to regress as the subject moves farther away. The viewing and focusing of images can also be difficult.

2. Infrared filters reduce visible light. When capturing aerial haze penetration and heat effects, infrared filters are helpful. This kind of filter absorbs visible light and transmits only the infrared light to the lens of the camera.

3. Natural density (ND) filters can be used to obtain proper exposure in high intensity lighted surroundings. It is also used to produce a specific opening of the lens for image sharpness and absorbs light evenly from the visible range. In effect, ND filters alter light exposure, even without changing the lens opening.

4. Polarized filters enhance contrast, reflection, and color control. Compared to other filters, they are built on different optical principles. In just one vibratory direction, a polarized filter allows light to pass through. This kind of filter can be aligned in many ways, giving the image more interesting effects. Polarized filters are normally used for taking pictures outdoors because they enhance color saturation and contrast. They also create different colors. For example, a yellow bright light can be produced using a yellow polar filter.

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