The K&F Concept black diffusion 1/4 filter with its unique 28 multi-layer coating, function effectively reduced the reflection that came from both the ground and the filter itself, ensuring the light transmittance to 84%. Even at its lowest density this black diffusion 1/4 filter can soft wrinkle and pores of human skin, it delivers an effective increase in the halation which adds a pleasing depth of warmth showing the delicate and hazy movie effect in images but is not transported to the skin tone values.