The Schneider 4.5" True-Pol Linear Polarizer Filterhelps to reduce reflections and 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 linear polarizer differs from a circular polarizer in that it does not contain an additional quarter wave plane. The addition of a quarter wave plane is to circularly polarize 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, in-camera 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 recommended when not using in-camera exposure metering or autofocus. It is non-coated and delivers approximately 33% average light transmission. Constructed from Water White optical glass, this 4.5" filter is mounted for use in third-party or custom filter holders. No front or rear threads are included on this filter's ring, or mount.

Mounted Linear Polarizer Filter    For Third-Party or Custom Holders    2.97x Filter Factor, +1.57 Stops    Helps to Eliminate Reflections and Glare    Reduces Haze in Landscapes    Greater Color and Tonal Saturation    Non-Coated    Water White Optical Glass    4.5" Filter Ring, Mount    Filter Pouch

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

Mounted without front or rear threads for use in third-party or custom filter holders for film and television cameras.

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.

Recommended when not using in-camera exposure metering or autofocus.

Non-coated.

Approximately 33% average light transmission.

2.97x filter factor reduces exposure by 1.57 stops.

Constructed from Water White optical glass.

Filter Pouch for storage and transport.

Related Questions and Answers

Q: 1. Would this work well with the Tilta Mini Matte Box? Also would you recommend the linear or circular for a Sony FX30 camera?

A: Yes, the Schneider 4 x 5.65" Linear True-Pol Polarizing Filter would work perfectly with the Tilta Tiltaing Mini Matte Box. Also, here are a few screw on filter options for Sony FX30 lenses. PolarPro 82mm QuartzLine Circular Polarizer Filter BH #POCP82Q B+W High-Transmission MRC-Nano Master Circular Polarizer Filter (82mm) BH #BWCPHTM82

Q: 2. Aside from the polarizing, what amount of ND does this amount to?

A: Schneider 4 x 5.65" Linear True-Pol Polarizing Filter ranges from 1.2 to 1.5 stops of density depending on the amount of polarization.

Q: 3. Will this fit into revar cine rota pola tray?

A: Yes ,that is the reason I purchased it. Works Great.

Q: 4. Will this filter work with RotaPola Rota-Tray 4x5.65" ?

A: No, it is not compatible.

Q: 5. What's the difference between the Linear and Circular versions of 4 x 5.65 please? Do they both require a matte box with a rotating filter tray?

A: Here Linear and Circular refer to the type of Polarizing film in the filter. The confusing Circular term actually has nothing to do with the shape of the filter. It can be round or rectangular, it does not matter. A Linear Polarizer is be used in cameras without auto focus or auto exposure. A Circular Polarizer is to be use in today's digital cameras with their auto focus and auto exposure. You will need a filter holder/matte box with a rotating 4 x 5.56 to use this size Polarizer. However, we recommend that instead of a rectangular Polarizer filter, using a round one for it is much more practical, i.e., easier to use.

Q: 6. Will this fit a Xeen 24mm Cine Lens?

A: No, the Schneider 4.5" Mounted True-Pol Linear Polarizer Filter is made for Third-Party or Custom Holders.

Q: 7. Will this work with the Bright Tangerine Misfit Atom Pola+ Matte Box?

A: Yes it will.

Q: 8. Hello! If I use this filter in a RED Matteboxhttp://www.red.com/store/products/red-matte-box-with-full-cage-side-flagswill this filter work fine and do the job? I ask this because I thin it is not possible to rotate the filter tray in this matte-box.Thank you

A: The RED Mattebox in question will support linear 45.6 filter trays and allow you to use the Schneider Circular True-Polarizing Filter (4 x 5.65 ).

Q: 9. Does rotating the filter change it’s effect?

A: Yes, you insert the filter in a holder and rotate the holder to achieve the desired effect, ie; removing reflections from glass or water as well as saturating colors, etc...

Q: 10. Can the filter take off from a mounted version to fit into Revar Cine Rota Tray? How the filter is fixed to the ring?

A: You can remove the mount but it's very difficult and you could damage the filter doing it. The threads on the mount are also very thin so you can damage those too. I would buy the unmounted one to use in the Rota pola tray. Nick