Canon’s New HDgc Lenses Let You Maximize The Potential Of Your JVC ProHD If you own or plan to buy a JVC ProHD Camcorder you'll want to make sure it's outfitted with the KT20x5B KRS Canon HDgc lens. Like all of the lenses in Canon's HDgc line, the KT20x5B KRS delivers superb optical quality and features many of Canon's remarkable high-end advances. By using JVC's 2/3 inch-to-1/3 inch lens adapter, you can also use Canon's full line of 2/3-inch HDgc lenses. These include the KJ21ex7.