Matte Box Retaining Rings are available in many sizes. The larger matte boxes have a 142.5mm backplate, so often a rubber bellows is added, such as a 410-13 (100mm), 410-11 (110mm * also most common) and 410-17F ( 95mm), are added. From these available rubber bellow sizes, the retaining rings are added for the appropriate lens size starting from 100mm, these retaining rings are available from 62 to 95mm. For use with the 110mm bellows, sizes from 80 to 105mm are available. Hard rings from 142.5 to a range of 114mm to 136mm are available as well.
Contact Schneider Optics or your local authorized Chrosziel dealer for the correct ring for your application.
A complete listing of available sizes will be coming soon!
Light Prevention Rings for MatteBox.pdf