Through yellow and green light, absorbing red light and blue and purple light, the wavelength is about 5-6nm.

an additional lens installed in front of the camera lens for filtering natural light, namely three primary colors;

UV (ultraviolet) mirror

This mirror can basically eliminate the influence of ultraviolet light and stray light on film sensitivity, and at the same time protect the lens.

photography in plateau area is even more necessary.

the skylight

absorbs ultraviolet rays and is suitable for all weather.

outdoor photography can reduce the phenomenon that the shadow part is blue caused by scattered light in sunlight, and keep the natural color.

it is also used to protect the lens.

red mirror (R)

absorbs blue light, which can produce a romantic sky effect or a moonlit effect during daytime shooting, and has the function of absorbing ultraviolet rays.

When shooting, it is generally necessary to increase the exposure level by three levels, which should be flexibly mastered according to the shooting requirements and the depth of the filter.

this mirror is generally used for black and white photos, and can also be used for color photography.

The orange mirror

absorbs blue and green light and passes through yellow, orange and red, that is, the wavelength is about 56-7nm.

It can deepen the blue tone and enhance the contrast effect of the scene.

yellow mirror (Y)

is used for all black-and-white film.

It can accurately correct the tone of full-color film in outdoor photography, so as to create greater contrast between blue sky or trees and white clouds.

It can be used as a special effect filter in color photography.

green mirror (G)

passes yellow and green light, absorbs red light and blue and purple light, and can pass in the wavelength range of about 5-6nm.

It is often used to darken the sky and express skin tone.

the exposure needs to be increased by about 3 levels.

generally, it is only used in full-color films.

blue mirror (B)

is used for black and white photography.

The mirror absorbs red, orange and yellow through cyan, blue and violet light.

when the wavelength passes in the range of 4-5nm, it is necessary to increase the exposure by about 2 levels (according to the depth of the color lens).

grey mirror (ND)

has consistent absorption characteristics in the visible range.

it blocks light without any color change.

is a commonly used filter for adjusting brightness.