LENS PROTECTION ---without loss of picture quality, Aviation Grade Aluminum Frame with Red Plating on the Outer Frame, Reduce dust and moisture from reaching your lens element
HIGH TRANSPARENCY ---Optical Glass (up to 99.2% light transmission).
ULTRA THIN--- Frame thickness: 3.0-3.5 mm. Filter Thickness: 1.1 mm. Lens filter frame with thread for lens hood attached.
COMPATIBLE WITH ALL 40.5MM LENSES---Please verify your camera's/camcorder's lens thread size before ordering. Your camera's lens thread size will be marked somewhere on the lens barrel or printed underneath your lens cap. This number is always preceded by a "Ø" (diameter) symbol. For example: Ø40.5 = 40.5mm lens thread size. Lens is not included.