The 150 x 150mm SW150 Circular Polarizer Filter from LEE Filters is compatible with a LEE Filters SW150-series filter holder and helps to reduce reflections as well as glare by filtering out light that has become polarized due to reflection from a non-metallic surface. The light from the sun naturally becomes partially polarized due to reflecting off electrons in air molecules, causing the light to scatter into what appears as haze. 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. Due to how the light is broken down and filtered with a linear polarizer, auto focus and exposure accuracy become skewed during use. When the light becomes circularly polarized, it permits the use of these functions.

This filter is non-coated and is constructed from optical glass for clarity as well as color fidelity. When using the 150 x 150mm SW150 Circular Polarizer Filter, the desired degree of polarization is achieved by turning the filter holder it is placed in.

Circular Polarizer Filter    For SW150-Series Filter Holder    2.8 to 4x Filter Factor, +1.5 to 2 Stops    Helps to Eliminate Reflections and Glare    Reduces Haze in Landscapes    Greater Color and Tonal Saturation    Non-Coated    Optical Glass    Metal Case

Helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface.

Polarizing filters arrange, and filter, directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of the light.

Clears up haze in distant landscapes and provides more saturated, vivid colors.

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

Circular polarizers are ideal for use with digital cameras and autofocus lenses where a linear polarizer will often disrupt auto exposure and focus features.

Non-coated.

2.8 to 4x filter factor reduces exposure by 1.5 to 2 stops.

Constructed from optical glass for clarity.

Metal filter case for storage and transport.

Related Questions and Answers

Q: 1. Will this fit the Haida M-15 filter holder?

A: Yes, the Haida M15 Filter Holder will hold the LEE Filters 150 x 150mm SW150 Solar Stopper Neutral Density 6.0 Filter (20 Stop) BH #LESSWQ • MFR #SW150SOL

Q: 2. Little stop for Nikon 14 24

A: This Filter was designed to be used with the Lee SW Mark II Filter Holder. That Holder is only Compatibilityfor use with the following ultra-wide-angle lenses:Nikon AF-S Nikkor 14-24mm f/2.8G EDSamyang 14mm f/2.8 ED AS IF UMCSigma 12-24mm f/4.5-5.6 II DG HSMTokina AT-X 16-28mm f/2.8 PRO FX

Q: 3. Will this fit the Lee 100mm filter holder?

A: This filter will indeed fit the filter holder

Q: 4. Will this fit the Benro FH100M2 Filter Holder? If so, does it need the holder frame?

A: Yes, it will fit and it needs the filter holder frame.

Q: 5. Will a Lee 150mm ND filter fit properly in an NiSi filter holder?

A: yes, it will fit nicely.

Q: 6. 150x150 Lee Big Stopper can it be used for Solar Eclipse?

A: No, you must use a solar filter.

Q: 7. what is the typical exposure time for this when shooting waterfalls in the day.. are we looking at 10 seconds or 10 minutes?

A: Cathy, it would be somewhere around 1 second to 4 seconds. If the normal shutter speed is 1/1000 with big stopper it would be 1 second. If the normal shutter speed is 1/250 with big stopper it will be 4 seconds. Lee filters has a nice app that shows the conversion if you are interested.

Q: 8. What does it means that this filter " designed for lenses with focal lengths of 70mm or less. " Is ther any harm in using it with long telephoto lenses? Will it harm the image quality?

A: Anything above 70mm we don't recommend using the Circular Polarizer because you may not be able to achieve focus.

Q: 9. Since this is a circular polarizer, does that mean the amount of polarization will be affected by the amount you rotate it?

A: Yes as you rotate it inside the filter holder purchased separately you set the amount of polarization. But you would rotate a linear polarizer the same way to set the polarization.

Q: 10. Is it me or is the textprinted on the wrong (back) side of the filter? Circular pols only work one direction (not an issue when its in a threaded mount but this is reversible) and when I use this one in the correct way the writing on the glass faces the back. Anyone else notice this?

A: The word text u mean the numbers written on the filter. Stil i didnt notice it but its working perfectly for me. I dont think its printing mistake