PRODUCT FEATURES

- Filter factor of 1.25 to 1.4x
- +0.3 to 0.5 stops
- Helps eliminate reflections and glare
- Reduces haze in landscapes
- Better colour and tone saturation
- Multi-coated optical glass with black edge
- Resistant to water, oil, static charges and scratches
- Slim aluminium alloy filter ring
- 72mm front filter thread
- Knurled front edge, plastic case

Overview of the Sigma AFF9C0

The Sigma 72mm WR (Water Repellent) Circular Polarising Filter helps reduce reflections and glare by filtering polarised light caused by reflection off non-metallic surfaces. Sunlight naturally becomes partially polarised when reflected by electrons in air molecules, causing light to scatter as haze. A polarising filter organises and filters this polarised light directionally perpendicular to the reflected light, allowing a large portion of this light to be absorbed. The result is a notable reduction of reflections and glare on non-metallic surfaces and an increase in the saturation of skies and vegetation.

A circular polariser differs from a linear polariser only by the addition of a quarter-wave plate in addition to the linear polarising filter. The addition of this quarter-wave plate circularly polarises 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 accuracy of autofocus and exposure is skewed when using them. When light becomes circularly polarised, it allows these functions to be used.

This filter is multi-coated to eliminate ghosting and internal reflections. An antistatic coating helps limit the build-up of static electricity, making it easier to remove dust particles or preventing them from adhering to the filter. In addition, a water-repellent coating enhances the beading effect on contact with water and oil, for better cleaning efficiency while improving scratch resistance. Sigma WR Circular Polarising Filters are constructed from optical glass with a black edge. Placed in an aluminium alloy filter ring that can be rotated to adjust the intensity of the polarising effect, the glass offers increased clarity as well as colour fidelity while the black edge ensures that no reflections occur along the edge of the filter.

- Helps reduce reflections and glare by filtering polarised light caused by reflection off non-metallic surfaces.

- Polarising filters organise and filter polarised light directionally perpendicular to the reflected light, allowing a large portion of the light to be absorbed.

- Eliminates haze in distant landscapes and provides more saturated and vivid colours.

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

- Circular polarisers are ideal for use with digital cameras and autofocus lenses where a linear polariser often interferes with exposure and autofocus functions.

- Multi-coated to help eliminate ghosting and internal reflections.

- The antistatic coating helps limit the build-up of static electricity, making it easier to remove dust particles or preventing them from adhering to the filter.

- The water-repellent coating enhances the beading effect on contact with water and oil, for better cleaning efficiency while improving scratch resistance.

- The filter factor of 1.25 to 1.4x reduces exposure by 0.3 to 0.5 stops.

- Constructed from clear optical glass with a black edge that ensures no reflections occur along the edge of the filter.

- The slim aluminium alloy filter ring helps prevent vignetting and is durable while remaining lightweight.

- The filter ring can be rotated to adjust the intensity of the polarising effect.

- The knurled front edges provide a better grip when mounting or removing the lens.

- The 72mm front thread allows use with other filters.

- Plastic filter case for storage and transport.