Item Type: Infrared Filter, Brand: FOTGA Material: Aluminum Alloy + Optical Glass; Quantity: 1 piece; Wavelength: 530nm590nm630nm680nm720nm750nm; Main functions: Rotating filter outer ring can be adjusted to 630nm from 530nm to 590nm after 750nm. 45g frame thickness Approx 1.6cm /0.63" Optional Filter Interface Diameter 52mm / 2.05" 55mm /2.17" Package List 1x IR Filter