KANI 818393 Fitting Ring, 4.1-4.1 inches (105-105 mm), Spacer Ring, 0.1 inch (2.5 mm) Knurling, Filter Accessory, Compatible with FE400-800 mmF6.3-8, Black Frame, Aluminum

105-105mm Spacer ring 2.5mm Filter fitting for 105mm lens frame diameter and extending the filter mounting position. Increases control of the filter on super telephoto lenses with rubber attached lens tip to protect the lens barrel The extended mounting position also allows for smooth operation when removing and removing the filter. If installed on lenses with a wide angle of view, such as super wide angle lenses, there is a risk of vignetting occur. Main Specifications: Lens Frame Diameter: 4.1 inches (105 mm) / Filter Side Diameter: 4.1 inches (105 mm) Diameter: 4.3 inches (109 mm) Frame thickness: 0.1 in (2.5 mm) (excluding screws)

• Extension ring that can be attached to a lens with a 4.1 inch (105 mm) frame diameter to extend the filter mounting position
• The adapter is constructed with knurling around the perimeter for easy on and off
• Product Name: 4.1 - 4.1 inches (105 - 105 mm), Spacer ring 0.1 inches (2.5 mm) (Model Number: K19183)
• External dimensions: φ4.3 inches (109 mm), Frame thickness: 0.2 inches (5.5 mm) (effective frame thickness excluding screw part) / Weight: Approx. 0.6 oz (16 g)
• Lens Frame Diameter: 105mm / Filter Side Diameter: 105mm