What Does A Red Filter Do In Black And White Photography

How would I create this effect in PS.

What does a red filter do in black and white photography. It is mainly used for black and white photography and also be used in some color film so that the whole image into the green. Supposedly red filters are a help in haze and fog but the effect is pretty dramatic in this otherwise normal shot. Black and white film uses a full range of the visible colour spectrum to create a full range of tones on your black and white negative.

I dont own an orange filter yet anyway and cant compare on. From here it is a matter of personal taste adjusting the light and dark of your image the white and black points to suite the image and maybe applying curves as appropriate. Each of these color filters lets through its own color and blocks other colors not completely.

A lot of landscape and architectural photographers will use this filter to create dramatic separation between blue skies. There are 5 filter colours that are commonly used in black and white photography - red orange yellow green and blue. That ages me use of a red or orange filter could produce dramatic effects turning a blue sky dark or even black whilst the rest of the photo would be relatively unaltered unless it contained a lot of blue anyway.

As we move further away on the color wavelength chart density increases to near black as we get to green and beyond. The same red filter can be used in landscape photography to dramatically darken blue skies and produce deep shadow effects. Sometimes you know youre shooting for black and white.

Each lets through its own colour of light and blocks other colours to varying degrees. With the red filter for example clouds. Using red green and blue.

Hoya 25A - Red Filter. The way coloured filters work is that they let in more of a certain type of coloured light the colour of the filter and block the opposing colours. Try it out on a foggy sky above a landscape or when shooting red flowers.