1,[White Balance Correction] The color temp of the framing object has reached the color balance, which can be used for camera white balance correction to facilitate the camera to catch the true color. 2,[Lens Protection] Made of high quality materials, anti corrosion, anti oxidation, can also be used as a normal lens cover to protect the lens from abrasion and dust. 3,[Easy To Use] Professional camera lens cover, easy to install, snap on design, easy to open and close, easy to use, small size, light weight, easy to carry, with long service life. 4,[Color Reproduction] Overcome the defect that CCD cannot accurately reproduce color under complex lighting conditions, and is suitable for professionals' needs for high end photography. 5,[Professional Design] Derived from the working principle of CCD and CMOS, this white balance lens cover is specially designed for digital camera white balance needs. 1 xandnbsp Snap on Lens Cover Item Type: Snap on Lens CoverMaterial: PlasticCaliber: Approx. 77mm or 3.0in