Balens White Balance System... Go from orange, blue and green-tinted photos to beautifully captured color with the baLens Cap and achieve a look that is not always possible with in-camera automatic white balance or with in-camera pre-set white balances. Just squeeze both side tabs of this high quality baLens Cap which has deeper holes with ridges for easy mounting or removal, especially when using a lens hood. Its center pinch-release mechanism and streamlined design help to prevent the baLens Cap from accidentally being bumped off, either while traveling or when shooting in a crowd. So no matter how challenging the lighting, with a baLens Cap you can get better colors conveniently because the cap is already on your lens without having to carry an extra accessory! The baLens Cap is supplied in the following sizes; 52mm, 55mm, 58mm, 62mm 67mm, 72mm and 77mm. Each baLens Cap system is comprised of the baLens Snap Cap, a Neutral color dome and a Warm color dome (is bluer in color and there is a red dot on the warm dome). The domes are easily interchanged thanks to the bayonet retaining ring on the inside of the baLens Cap.