Polarizer

Polarizer is a common optical filter, whose function is mainly reflected in
In the following aspects:
Eliminate or reduce the reflected light from non-metallic surfaces. When shooting objects with smooth surfaces, such as glassware, water surfaces, paint, and plastic surfaces, flares or reflections often occur. After adding a polarizing mirror, rotating the mirror surface can block these polarized lights, thereby eliminating or reducing the reflection and bright spots on smooth object surfaces. This can better showcase the details and texture of the subject, and improve the clarity and color saturation of the image.
Used as a neutral gray filter. By rotating the angle between two polarization axes, different degrees of light blocking can be obtained, thereby reducing the amount of light entering the lens and extending the exposure time. This is particularly useful in landscape photography where the contrast between the sky and the earth needs to be reduced to achieve a balanced effect.
Adjust the tone and color of the sky. Due to the presence of a large amount of polarized light in the blue sky, using a polarizing mirror can adjust the brightness of the sky, highlight the white clouds in the blue sky, and make the blue sky bluer and more saturated. In addition, it can also be used to absorb the stray light reflected by fog and ash in the atmosphere, making the captured images purer.
Control the transmission of ultraviolet rays. In some cases, polarizers can effectively block ultraviolet light, which is important for protecting the photographer’s eyes and preventing excessive ultraviolet light from entering the lens when shooting outdoors.
Please note that although polarizers are very useful in many situations, they are not omnipotent. The effect mainly depends on factors such as the reflection characteristics of the subject and the lighting conditions. Therefore, flexible adjustments should be made according to the actual situation during use.