Yellow Filters (Black and White Photography)
Yellow filters product the most subtle effect of the 5 coloured filters. In some areas the difference is barely noticeable, but it can help to lift a photo is just enough. They’re a popular choice for beginners as they can be used in virtually any type of photography.
When snapping landscapes, a Yellow filter darkens the sky slightly, helping to balance its exposure against the darker ground. They also bring out clouds nicely resulting in more interesting skies.
In portrait photography, they produce warm, natural, pleasing flesh tones, like an orange filter but less intense.
Yellow filters are good for separating shades of Green and can be used when photographing plants to increase the contrast of foliage.