1pcs 2.8mm CCTV Lens & 1pcs Camera IRIS Lens; with Hat : Material: Metal & ABS, glass,Size : 14 x 16.88mm(D*H) &20 x 15 mm,Mount : 12 * 0.5mm & Mount Thread Size: M12,Focus Length : 2.8mm & 3.6mm ,Weight : 5g & 4g Super-Wide Angle Lens: The 2.8 mm Board Lens provides an extra-wide field of view, which is perfectly suited for most installations. A 6mm lens will bring you closer to the action than a wide angle lens, and when used with an IR Camera, it will not cause glare from the IR light, as a wide angle lens will. All IR Camera manufacturers recommend using a 2.8mm Standard Board Lens or higher for use with their IR Cameras. Easy to Install: Replacement lens easily threads in after removal of the previous lens is removed. Product Name : CCTV Lens Image Format : 1/3 Mount : 12 * 0.5mm & Mount Thread Size: M12 Focus Length : 2.8mm & 3.6mm Back Focus Length : 4.4mm Aperture : F2.0;Angle of View : 120 Degree Weight : 5g & 4g Product Name: Camera IRIS Lens; SCREEN SIZE: 1/3 inch Wavelength: 350nm-650nm Color; black Material: Metal & ABS, glass Size : 14 x 16.88mm(D*H) &20 x 15 mm Package Content : 1 x 2.8mm CCTV Lens 1x Camera IRIS Lens; 1 x Hat Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. 1pcs 2.8mm CCTV Lens & 1pcs Camera IRIS Lens; with Hat : Material: Metal & ABS, glass,Size : 14 x 16.88mm(D*H) &20 x 15 mm,Mount : 12 * 0.5mm & Mount Thread Size: M12,Focus Length : 2.8mm & 3.6mm ,Weight : 5g & 4g Super-Wide Angle Lens: The 2.8 mm Board Lens provides an extra-wide field of view, which is perfectly suited for most installations. A 6mm lens will bring you closer to the action than a wide angle lens, and when used with an IR Camera, it will not cause glare from the IR light, as a wide angle lens will. All IR Camera manufacturers recommend using a 2.8mm Standard Board Lens or higher for use with their IR Cameras. Easy to Install: Replacement lens easily threads in after removal of the previous lens is removed.