These Arri MB-20 Filter Rings are used between the background bellows adapter and your lenses.
These Filter Rings allows the user to step down to a smaller lens diameter by reducing the 138mm diameter of the bellows adapter. The Filter Rings also have an enclosed area where 138mm filters can be inserted and secured. A screw on coupling keeps the filter inside the Filter Ring. These Filter Rings will step down to a 114mm diameter and 114mm diameter wide-angle for internal focus lenses, as well as down to 100mm.
CAT 338568 K2.47190.0, 333060 K2.47222.0
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
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