Polarizing lenses

Polarizing lenses, act as a polarizing filter for light, allowing only polarization in one direction to pass through. A polarizing lense during photography may change how your camera sees reflections and glare. As a result, it also can change the vibrancy of some colors in shots.

A single polarizing filter assists in the adjustment of the impact of light on the photographs by simply rotating the front element of the filter. During rotation the colors and reflections in the shot change. For the greatest impact, the sun has to be kept at 90° to the camera. This will enhance the effect of the polarizer. Polarizers shouldn’t be used in low light or during the night, as they may have the opposite effect; as if you are wearing sunglasses indoors.

Malu’s law describes the effect of two polarizing filters on an originally unpolarized light. The first filter polarizes the light along its axis. When the axes of the first and second filters are aligned (parallel), then all of the polarized light passed by the first filter is also passed by the second. If the second polarizing filter is rotated, only the component of the light parallel to the second filter’s axis is passed. When the axes are perpendicular, no light is passed by the second.