From Manufacturer
Illuminate and locate dust and other particles on the heart of your camera with the Quasar R 5x Sensor Loupe Magnifier from VisibleDust. Its extra-low dispersion (ED) glass element features an MgF2 fluorine coating, which provides a high level of clarity while minimizing chromatic aberrations.
The loupe offers 5x magnification power and 14 LEDs, including 7 white diodes and 7 red ones with Dark Adaptation Technology. The wavelength of these crimson LEDs allows for better viewing in dark environments once your pupils have dilated and your eyes have adjusted, thus allowing for better visibility of the spots and debris on your image sensor. Additionally, VisibleDust uses the term Bright Vue technology to describe the benefit provided by the combination of the brightness of the LEDs and their vari-angled orientation in the loupe. This setup is designed to create a 3D image of your sensor as you peer through the lens, helping you see even the smallest spots clearly.