The new Petroff matte box comes in three different sizes: 4"x4", 4"x5" and 5"x5".
The standard system accommodates three filter stages. By special order it could be easily modified for four or more stages. All filter stages rotate 360 degrees independently, but in order to operate comfortable with polarizing filters one or two stages could be blocked from rotation.
For a preview of the products and features, click on an image below to enlarge:

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