Feature:1. Advanced knurling technology prevents slipping and easy to disassembe.2. High quality aluminum alloy frame design, the front of the frame with thread which can be mounted lens cover and other accessories at any time.3. The rotating outer ring of the filter can adjust the wavelength arbitrarily, which can be changed from 530nm to 750nm.4. Suitable for infrared photography creation. This is a very practical integrated adjustable infrared filter, which can provide you with more operational content of infrared photography.5. Comact size, lightweight and easy to carry.Specification:Item Type: Filter Brand: FOTGAMaterial: Aluminum Alloy + Optical GlassColor: As picture shownWavelength Range: 530-750nmFrame Thickness: Approx. 1.6 cm/ 0.63 inchCaliber: Approx. 58 mm/ 2.28 inchWeight: Approx. 59.3 gPackage List:1 x Filter