Cokin X027 Warm 81B Filter for XL SeriesAdd Warmth to Your Photography with the Cokin 81B Filter The Cokin Warm 81B filter is designed to convert cool or blue light to warmer light, enhancing the overall look and feel of your images. Ideal for overcast days or shady environments where the light can be too cool, this filter adds a subtle warmth that brings out natural tones and enhances the mood of your photos. Cokin Square Warm 81B (X027) Filter Specifications: Filter Type: Conversion