Filter 37 MM MC-UV K&F Concept KU04 K&F Concept KU04 37mm MC UV filter. The MC-UV filter is specially formulated to effectively eliminate most of the harmful UV rays, while maintaining the full naturalness of colors. It also provides reliable protection for your lens from dust, pollen and scratches, and with a light transmission rate of 99.2%, it leaves your image pristine and clear. Manufacturer K&F ConceptModel KF01.022Thread diameter 37 mmThickness 3.6 mmLight transmittance 99,2%Weight 14,5 g