The Tiffen 4 x 4" Linear Polarising Filter helps to reduce reflections and glare by filtering out light that has become polarised due to reflection from non-metallic surfaces. Sunlight naturally becomes partially polarised when it reflects off electrons in air molecules, causing light scattering that appears as haze. A polarising filter arranges and filters this directionally polarised light perpendicularly to the reflected light, allowing for the absorption of much of this light. This results in a noticeable reduction of glare and reflections from non-metallic surfaces and an increase in the saturation of skies and foliage.

A linear polariser differs from a circular polariser in that it does not contain an additional quarter-wave plate. The addition of a quarter-wave plate serves to circularly polarise linearly polarised light for use with autofocus and exposure functions. Due to the way light is broken down and filtered with a linear polariser, the camera's autofocus and exposure accuracy become skewed during use. When light becomes circularly polarised, it allows the use of these functions.

This filter is recommended when not using the camera's exposure metering or autofocus. It is not coated and offers an average light transmission of approximately 40%.

Tiffen filters are manufactured using ColorCore technology; a process that involves laminating the filter substrate between 2 pieces of optical glass and polishing it flat to a tolerance of 1/10,000th of an inch.


Features:

- Helps reduce reflections and glare by filtering out light that has become polarised due to reflection from non-metallic surfaces.
- Polarising filters arrange and filter directionally polarised light perpendicularly to the reflected light, allowing for the absorption of much of the light.
- Eliminates haze in distant landscapes and provides more saturated, vivid colours.
- Strongest effect when used at a 90° angle from the sun.
- Recommended when not using the camera's exposure metering or autofocus.
- Not coated.
- Average light transmission of approximately 40%.
- 2.5 filter factor reduces exposure by 1.3 stops.
- Constructed using ColorCore technology.
- Filter pouch for storage and transport.


Specifications:

- Type: Linear Polariser
- Size: 4 x 4" / 101.6 x 101.6 mm
- Filter Factor: 2.5 (1.3 stops)
- Multi-coated: No
- Effect: Eliminates reflections and haze and enhances colour and tone saturation
- Construction: ColorCore Technology