1Advanced knurling technology, prevent hand slip, convenient to disassembly. 2High quality aluminum frame designed, frame front with thread, can install lens cover and other accessory at any time. 3Rotating filter, outer ring can adjust the wavelength arbitrarily, from 530nm to 750nm change. 4Suitable for infrared photography creation, very practical integrated adjustable infrared filter, can provide you with more operable content of infrared photography creation. 5For internal and weak shadows, use 680nm, using 750nm indoors and in low light.Condition: 100% Item Type: Infrared Filter Brand: FOTGA Material: Aluminum Alloy + OpticalGlass Color: As Pictures Shown Quantity: 1PCS Wavelength: 530nm590nm630nm680nm720nm750nm Main Function: Rotating Filter, OuterRingCan Adjust Wavelength Arbitrarily, Can Adjusted From 530nm To 590nm and Then To 630nm Until Adjusted To 750nm Weight: Approx. 76g Frame Thickness: Approx. 1.6cm/0.63inch Optional Filter Interface Diameter: Approx. 72mm/2.83inch,77mm/3.03inch 1 x Infrared Filter