The SM-44 4.5x SensorMag Magnifier with Dust Blaster from Carson Optical helps you to clean a DSLR's image sensor. The 4.5x-magnification lens is strong enough to help spot small particles and debris. The SensorMag's lens rests inside the camera's bayonet and features adjustable focus to accommodate different size cameras and flange depths. It also swings 45° out of the way to gain access to the sensor. There are two diameter settings to fit various camera bodies. Illumination is via six LEDs that operate on two included CR2032 batteries. The 1.8 ounce magnifier stores in its own zippered pouch.