The Dot Line Corp DL-SL DLC Sensor-Vu Loupe is used to spot tiny specs of dirt and grime on your DSLR's sensor. This loupe allows you to safely locate problem spots before using any kind of tool to remove them. The powerful 5x magnifier targets the dirt. Then, once you've located the trouble spot, you elevate the loupe to a wider 2x field which gives you a total view of the sensor. In this way, you see exactly what and where you're cleaning.