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SW150 Polariser: Circular Effect
Ideal polariser for autofocus SLR cameras. Slots into the Filter Holder which is then rotated. Reduces exposure 1? stops when fully polarised.
There are two types of Polariser, circular and linear. These names bear no relation to the physical shape of the filter itself but refer instead to the way the light waves are transmitted through the filter to achieve the polarising effect.
When light from the sun bounces off a flat non metallic surface, such as glass or water, it becomes polarised with all of the reflected light waves vibrating in the same plane. This reflected glare can be removed by the polarising filter.
The SW150 System features its own circular polarising filter. If used alone, the polariser can be placed into the filter holder and the holder rotated until the desired effect is achieved. If used with a grad filter, the grad should be positioned first, then the polariser added – you will have no rotation possible without turning the grad, but will have a choice of two axis of polarisation, achievable by turning the filter through 90 degrees.
The most important part of the SW150 system is the adaptor ring. This will allow the filter holder to be attached to your lens. Each adaptor ring in the range has a slight design variation, so make sure you purchase the correct version for your lens.
In addition to the adaptor ring, you will also require a filter holder. Once the adaptor ring is attached to your lens, the filter holder simply locks on, the filters are slotted in, and your system is ready to use. The filter holder comes assembled with two slots, allowing you to combine filters where necessary. Once attached, the filter holder can be rotated. This means that filters such as neutral-density grads can be used at an angle, for precise control.
LEE Filters 150 x 150mm SW150 Circular Polarizer Filter
Limited Lifetime Warranty
|Filter Type||Circular Polarizer|
|Filter Factor||2.8 - 4 (1.5 - 2 Stop)|
|Dimension||150 x 150 mm (5.9 x 5.9")|
|Filter Thickness||2 mm (0.1")|
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Lee Filters SW150 Polarizer
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