Reference: 90431694
Lens diameter 30mm - filter diameter 37mm.
Used to mount filters or pre-filters on lenses if the filter dimension is different than the lens dimension.
Reducing rings (also called step up or step down) are used to attach filters or pre-filters to lenses when the filter dimension is different from the lens dimension. Thus, they allow you to use one filter/pre-adjustment on multiple lenses. The first is the lens dimension, the second the filter dimension in mm.
Data sheet
Reference: 90431694
Reference: 90431453
Reference: 90431449
Reference: 90431735
Reference: 90431609
Reference: 90431599
Reference: 90431448
Reference: 90431605
Reference: 90431723
Reference: 90431497
Reference: 90431600
Reference: 90431717
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Reference: 90431732
Reference: 90431446