"What you can’t see can affect your pictures. Dirt comes from many sources and it must be removed in a safe and effective way, or your images will show this debris. Four common types of contaminants can get on your image sensor: Metallic, Fiber, Organic and Silica/Quartz particles. Only the SensorScope system addresses all four types of material and the proper way to remove them safely. SensorScope enables you to check your sensor to see if it needs cleaning-there's nothing safer than not cleaning your sensor. The SensorScope looks like a camera lens; however, it allows you to look back into your camera to inspect your sensor. The SensorScope is easily portable and provides a 5x magnification lens and 4 ultra bright LED lights, which are focused to completely illuminate the field of inspection. Although specifically designed for Canon and Nikon DSLRs, the SensorScope may be used on any manufacturer's DSLR."What a wonderful kit! One can analyze dirt on the DSLR sensor and then use one of the myriad of tools provided to clean it away. However, I guess there is a limitation that this solution will only work with cameras that have a cleaning mode. Unsurprisingly, it is backordered.