Very Important: Inside the black envelop, you get a QR code INSTALLATION INSTRUCTION card please see the video before start using the product.
Installation: Now switch your filter in 2-3 seconds with Freewell Quick Swap Magnetic system no more threading
Optical Glass: Made of using the High Definition Premium Optical glass double-side multicoated Zero chromatic aberration (color shift)
Freewell Gear Camera Filter Kit ? CPL, ND1000