The addition of a lens hood can help prevent flares--those circles of light that can accompany images where a strong light source is just outside the fame. These type of lens flares occur when indirect light rays pass through the front lens elements but don't make it all the way through to the image sensor. Canon's LH-DC30 Lens Hood is threaded to screw right into the barrel of the Canon PowerShot G6. The hood's wide-mouth design is made to protect against wide-angle light rays without vignetting.