Specifications: Compatible filter diameter: 1.9 inches (49 mm); Material: Lightweight aluminum; Weight: 0.5 oz (15 g) (including metal ring); Metal ring for camera mounting: Outer diameter 1.4 inches (31.9 mm), inner diameter 1.1 inches (27.8 mm); Compatible cameras: Canon S95, S100, S110, S120 and equivalent cameras. *Please refer to the size of the metal ring that attaches to the size of the size of the lens front frame of the digital camera lens on the size of the digital camera. This metal ring can be attached to a camera that does not cover the lens and does not interfere with the extending of the lens. If not the camera listed above, please measure your lens front frame carefully before purchasing. For cameras such as Sony RX100 / HX9V / HX20V / HX30V, Canon G12 / G15 / G7X, please purchase a 58mm, 55mm, 52mm filter adapter (metal ring is larger ).