The 77mm Nano-X Series Blue Streak Filter from K&F Concept can be used to add a layer of blue transparent lines to an image to create blur, deformation, and other visual effects. Grinding and polishing technology used on both sides of the filter ensures that the sharpness of the image is retained. The filter is made with 2mm optical glass and features a 28-layer coating that reduces reflections and also makes the filter waterproof, oilproof, and scratch resistant. The filter frame is made of aluminum and is only 5.3mm in thickness. The surface of the frame has a trapezoidal pattern for improved handling when rotating it to adjust the angle and direction of the blue streaks.