What filter is used to dim the light in black and white photography?

Black and white photography is usually used in large and medium formats. Such as Schamoni and so on.

LIPA has this filter. If the general camera for black-and-white photography has infrared function, you can use infrared 760 850, which can make the image very beautiful and can also be used for black-and-white photography.

In addition, like red mirror, orange mirror, yellow mirror, yellow-green mirror and blue mirror. Can increase the color contrast.

Make black and white images clearer and colors clearer.