Tiffen 6x6" Ultra Circular Polarizing Glass Filter

If you are also using a variable ND on your camera and want to use a polariser as well, you definitely need a circular one as a linear polariser will cause a colour shift as you rotate it.

Circular Polarizers are designed for use with auto or manual focus lenses, while linear polarizers are best used with manual focus lenses.

Basically, there are two types of Polarizing filters; Linear and Circular. Linear are used for manual focusing as they can confuse AF sensors. Circular filters are designed for AF lenses and cameras but can be used on manual focus cameras as well. For more details on the two, please see: http://bhpho.to/MF21zoThe Schneider 138mm True-Linear Polarizing Glass filter is optimized for motion picture and television cameras. Having an extinction ratio of ER 374, the Schneider True-Pol is 12-times more effective than other polarizing filters. The 138mm Circular Ultra Polarizing Filter from Tiffen is a similar filter yielding a more intense look to your images and is designed for AF cameras. Because of manufacturing differences, circular polarizing filters cost more than comparable linear filters. Both filters come with ten year warranties that cover manufacturing or workmanship defects.

You would need a holder that will take this size filter. The exact holder depends in part on the lens you are using.

Hi, this filter is compatible. with the Wooden Camera Zip Box Pro 4.5in Round Filter Stage.

The Tiffen 4 x 5.65" Ultra Pol Linear Polarizer Filter, being a linear polarizer, is not good for digital photography. For digital photography, you would want to use a circular polarizing filter. Here is a link to the circular polarizing filter options in the 4 x 5.65" size: https://bhpho.to/4dOpbz9.

Claude, the advantage is you are not paying for multi-coating which is not necessary.

Which matte box did you purchase? Does it accept 138mm filters?