the Canon DM 50 appears to be a phantom device. I have seen it listed but even the Canon web site does not show it for sale. Everywhere I check says it "back ordered". Probably does not really exist...yet. Audio Technicia has a couple of shotgun microphones that are cheap (under $100) and appear to have a good reputation. One is a mono mic that is directional. The other is steareo and not so directional (ATR 25 and 55). I have not used them myself, but have read about people who are using them with good success.