K&F Concept 37mm 6pcs Filter Set Slim UV Slim CPL Slim FLD ND2 ND4 ND8 Lens Filter Kit UV Protector Circular Polarizing Filter Neutral Density ND Filter Set for DSLR Cameras Package includes: K&F Concept 37MM Slim FLD+Slim CPL+Slim UV + 37MM ND2+ND4+ND8 + Cleaning Pen + Filter Pouch Low Profile Frame. Ultra Thin Frames to help avoid vignetting on super wide angle lenses. These frames The filters are double-threaded, so you can stack your lens cap and other accessories as needed. Great for portraiture and outdoor scenes in strong sunlight. Reduces the amount of light reaching the film without affecting the color.Applies slow shutter speed under strong sunlight exposure. Allows wider apertures, effectively decreasing depth of field. Brand of K&F Concept manufactured by a professional team.