What are the applications of the filter in shooting?

Aug. 01, 2019

What are the applications of filters in shooting?

Filters are made of plastic or glass with special dyes, red filters supplied by Customized Optical Components Manufacturer allow only red light to pass through, and so on. The refractive index of the glass plate is about the same as that of air, and all color light can pass through, so it is transparent. However, after dyeing the dye, the molecular structure changes, and the refractive index changes, so the passage of some color light changes. For example, if a beam of white light passes through a blue filter, it emits a blue beam of blue light. Therefore, the use of filters in digital products is becoming more and more common, and more and more important. Today, breda optoelectronics will learn about the application of filters in shooting. What does it do? Why do we take more and more beautiful photos?

Filters change the tone of your black and white photos. For example, a suitable filter can make the blue sky darker, so that the white clouds appear clear and layered. A red filter separates the rose from its background. As long as you choose the right filter, you can change or enhance the tone of a scene to highlight what you want to emphasize.

The filters are usually made of transparent tinted glass and usually have threaded metal frames that can be attached to the front edge of the lens.

Ordinary white light consists of three primary colors: red, blue, and green. If you mix red, blue and green light, you get white light.

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If you combine red and blue light, you get magenta light -- like a reddish blue light.

If you add red and green light together, they appear yellow.

What if you add blue light and green light together? They form cyan light -- like green light with some blue in it.

Each colored filter lets only the same color pass through, absorbing the other primary colors. Such as:

Red filters allow only red light to pass through, while absorbing blue and green light.

Green filters let green light pass through, absorbing red and blue.

The yellow Neutral Density Filter lets only yellow light (the combination of red and green) pass through, absorbing blue light.

When shooting in fog, use filters to get good results. All three of these basic filters will help you get a satisfactory picture through the haze or fog in the atmosphere. This is because the blue light is scattered by small particles of dust and droplets in the mist, and all three filters absorb the blue light to varying degrees, so they all help us take clear pictures through the mist. If it's just foggy, a yellow or light green filter is more than enough. But if it's a thick, foggy color, a red filter might work better.

Polarizing filters can filter out any object with a nonmetallic, shiny surface from the glare of unwanted reflections.

You want to photograph a shop window. Without polarizing filters, you might be able to take a messy reflection of light, which is where the polarizing filters come in.

You might be sent to photograph a beautiful table, trying to show the wood grain beneath the polished surface. Without a filter, perhaps the reflection of the smooth table top will make the wood grain completely invisible. You also use a polarizing filter.


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