Century's .7X Wide Angle Converter attaches quickly to the front of your XL2's 20:1 zoom, offering a 30% wider angle of view and full zoom-thru capabilities. The .7X shifts the focal length range from 5.4-108mm to 3.78-75.6mm - with no appreciable light loss.
Canon's 3X lens is compact and useful, but imagine switching those delicate electronic lenses quickly on a wet day at the beach. The .7X Wide Converter slips onto the front of the 20X zoom with a one-handed twist, instead. Yet it results in an effective focal length nearly as wide as the 3X (within half a millemeter) and zooms six times as far.