A linear polarizer differs from a circular polarizer in that it does not contain an additional quarter wave plane. The addition of a quarter wave plane is to circularly polarize linearly polarized light for the use of auto focus and exposure functions. Due to how the light is broken down and filtered with a linear polarizer, in-camera auto focus and exposure accuracy become skewed during use. When the light becomes circularly polarized, it permits the use of these functions.

This filter is recommended when not using in-camera exposure metering or autofocus. It is made using a process that involves laminating a layer of polarizing film between two pieces of optical glass. The glass layers are then ground flat to maintain image sharpness.

Helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface.

Polarizing filters arrange, and filter, directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of the light.

Clears up haze in distant landscapes and provides more saturated, vivid colors.

Strongest effect when used at a 90° angle from the sun.

Recommended when not using in-camera exposure metering or autofocus.

Non-coated.

2 to 2.8x filter factor reduces exposure by +1 to 1.5 stops.

Constructed using optical glass for clarity.

Leatherette pouch included for storage and transport.

manufacturer	NISI
Country of origin	‎Republic of Korea

Nisi 100x100mm Square HD Polariser filter