This Haida Magnetic Solid Neutral Density 1.8 and Circular Polarizer Filter is designed for use with a separately available Haida M15 Filter Holder. Combining a solid neutral density effect with a circular polarizer effect, this filter's 64x filter factor provides a 6-stop exposure reduction. By slowing your exposure time or increasing your aperture, you are able to control depth of field and convey movement more easily.
Simultaneously, this filter can help to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. A polarizing filter arranges and filters this directionally polarized 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 circular polarizer only differs from a linear polarizer in that it contains a quarter wave plane in addition to the linear polarizing filter. The addition of this quarter wave plane is to circularly polarize the linearly polarized light for the use of auto focus and exposure functions.
Mounted within a nonthreaded aluminum alloy ring, the Haida Magnetic Solid Neutral Density 1.8 and Circular Polarizer Filter is made specifically to fit between a separately available Haida M15 Filter Holder and an adapter ring for the filter holder. The filter holder's external dial integrates with the filter ring, allowing for the independent rotation of the solid neutral density and circular polarizer Filter.
The Haida Magnetic Solid Neutral Density 1.8 and Circular Polarizer Filter is constructed from optical glass for clarity and color fidelity. To prevent internal ghosting and reflections, each glass surface includes 10 layers of anti-reflection coatings, which also offer greater protection to the filter substrate and help keep it clean for a longer period of time.
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