Another recently introduced form employs blue and yellow filters.

The camera had a built-in deep yellow filter which could be positioned behind the lens.

Both the deep purple and yellow filters were eliminated in the redesign.

For this reason many super-telephoto lenses often incorporate yellow filters or coatings to enhance image contrast.

The display was covered with a yellow filter, supposedly to prevent ultra-violet radiation damage.

For that, you need to rely on a slightly yellow filter.

It's easy for me to slide in a slightly yellow filter to warm a midday scene.

Beneath the blue layer is a yellow filter, composed of dyes or colloidal silver.

Beneath the blue-sensitive layer and the yellow filter are the green and red sensitive layers.

To do so without a spectrometer would require you to get a special yellow filter.