مرشحات فصل الألوان حين التصوير على فلم أبيض أسود .. كتاب الإضاءة والفلم

Color Separation filters

When shooting on black and white film:

These filters separate the primary colors of the spectrum (red - green and blue) from each other, and are usually used for mechanical imaging purposes, imaging for printing purposes, to make printing plates for colored originals, and they are also used in color imaging to make color separation negatives (1).

Color filters:

There are special filters for color photography, the purpose of which is to adjust the color temperature of the light source rays in order to match the color temperature of the rays for which the reversal colored films were prepared. Color Casts during the process of enlarging or printing an image for positive images. We will suffice here with this much on this topic because it has been previously explained in detail in the book Colored Photography (1).

Common filters in both "color" and "black and white" photography

There are two other types of filters that can be used in both color photography and black and white photography.” And we have already talked about them in detail in the color photography book (2), so we will suffice here to refer to them as a passing reference, and these two types are:

(a) Neutral density filters: These filters do not affect the color of the rays that pass through them, but only reduce the intensity of the light passing through them towards the sensitive film. They have neutral spectral characteristics that reduce the intensity of the light without increasing the degree of Its absorption of a particular color from another of the components of the white rays.

(b) Polarizing filters

Although they partially perform the same previous function, they also reduce reflections on shiny surfaces. The function of these filters is based on the Polarization of light theory.