The B+W Smart-Pro Circular Polarizer from Schneider Optics is a circular polarizing filter that mounts to an iPhone, iPad, smartphone or tablet PC. It also works on all small camera lenses with a maximum diameter of 8mm. Once affixed to your device, the filter eliminates reflections and provides saturated, intense colors as well as an improved contrast ratio.
The filter system is also easy to use -- simply fit the small magnetic ring around the lens on your device. The filter can then be attached and easily aligned. While there are many apps and software to create special effects, this particular effect can't be simulated in this way. This filter is ideal for those who want an alternative to creating special effects through apps when using the built-in camera on their smartphone or tablet.