Uses of Photo Filter

Photo filters are essential accessories and form an integral part of camera lens. Besides serving protection to interchangeable lenses, filters can also be used to create various effects, such as eliminating shadows (CPL), light reduction (ND), macro (closeup) etc during actual photo taking. When taking pictures with various filters mounted on the lenses, the effect are taken instantly, eliminating post production editing which is time consuming.

The most essential filter is the lens protection filter, commonly known as UV filter. UV filter, when mounted on DSLR lens provides protection and reduces haze, making pictures clearer and more defined. For best image quality, multi coating on the glass would be essential. Multi coating enhances picture quality by allowing higher light transmission (brighter images) and at the same time, reduces reflection (clearer images).

Another must have filter is the circular polarizer (CPL). CPL is used mainly to cut off reflection from non-metallic surface and at the same time, reduces light volume from entering the lens, thereby increases contrast. Supplied with rotating ring, light reflection can be adjusted for maximum cutoff and the level of contrast can be controlled by rotating the front filter frame.

Besides the above 2 common essential filters, there are also other filter types such as Neutral density (ND), Infra-red (IR), Closeup (+1, +2, +4, +8, +10), Star (4, 8), Diffusion, Colored (R, G, B) etc.

For more information on various filters and their effect on digital images, visit Emolux website at


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