PRODUCT HIGHLIGHTS

- Filter factor of 1.25 to 1.4x
- +0.3 to 0.5 stop
- Helps eliminate reflections and glare
- Reduces haze in landscapes
- Increased colour and tone saturation
- Multi-coated optical glass with black rim
- Water, oil, static electricity and scratch resistant
- Slim aluminium alloy filter ring
- 62 mm front filter thread
- Knurled front edge, plastic case

Introducing the Sigma AFD9C0

The Sigma 62 mm 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 it reflects off electrons in air molecules, causing light diffusion that appears as haze. A polarising filter organises and filters this directionally polarised light perpendicular to the reflected light, allowing a large portion of this light to be absorbed. The result is a notable reduction in reflections and glare on non-metallic surfaces and increased saturation of skies and foliage.

A circular polariser differs from a linear polariser only by the addition of a quarter-wave plate to the linear polarising filter. The addition of this quarter-wave plate serves to circularly polarise the 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 compromised when using one. When light becomes circularly polarised, it allows the use of these functions.

This filter is multi-coated to eliminate ghosting and internal reflections. An antistatic treatment serves to 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 hydrophobic treatment enhances the beading effect upon contact with water, as well as oil, for improved cleaning efficiency whilst enhancing scratch resistance. Sigma WR Circular Polarising Filters are made from optical glass with a black rim. Mounted in an aluminium alloy filter ring that can be rotated to adjust the intensity of the polarising effect, the glass offers improved clarity as well as colour fidelity, whilst the black rim further 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 directionally polarised light 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 vibrant 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 disrupts exposure and autofocus functions.

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

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

- The hydrophobic treatment enhances the beading effect upon contact with water, as well as oil, for improved cleaning efficiency whilst enhancing scratch resistance.

- Filter factor of 1.25 to 1.4x reduces exposure by 0.3 to 0.5 stop.

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

- The slim aluminium alloy filter ring helps prevent vignetting and is durable whilst 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 filter from the lens.

- 62 mm front thread allows use with other filters.

- Plastic filter case for storage and transport.