Combined with the 143-114mm Rubber Donut (B1250.1001), this adaptor ring reduces the rear opening to accommodate lenses with a 100mm front diameter.
• Compatible with our industry standard 143mm rubber donut with 114mm metal threaded ring
• Provides additional light protection
• Built from high grade Delrin
• Dimensions (mm) 129 x 10
• Weight 42 grams