Cokin Z003 Square Red Filter Z-Pro Series

The Cokin Z003 is a 100mm x 100mm square red filter designed for the Cokin L (Z-Pro) series filter holder system. Red filters are a classic tool in black-and-white photography, where they dramatically darken blue skies and water, brighten red and orange tones, and create striking tonal separation between clouds and sky. The Z003 achieves this with a density of approximately 3 1/3 stops, meaning photographers need to increase their exposure by that amount to compensate for the light absorbed by the filter.

The 100mm square format is sized for the Z-Pro holder, which is designed to accommodate larger-diameter lenses commonly used in landscape, architectural, and medium-format photography. The square design allows the filter to be slid up and down within the holder to position the effect precisely within the frame. While the red filter's effect is dramatic and visually powerful, it is a specialized creative tool — best suited for deliberate artistic use rather than as an everyday carry filter. Photographers working within the Cokin Z-Pro ecosystem will find the Z003 a valuable addition to their filter collection for high-contrast landscape and fine-art work.