Item Type: Fisheye Lens Cover Color: As Pictures Shown Material: Optical Glass + Plastic + Aluminum Weight: Approx.524g/18.5oz Interface: M67 Threaded Interface Amplification Coefficient: X0.7 (Underwater) Package List 1 x Fisheye Lens Cover 2 x Pack Anti Fog film 1 x Manual Only applicable to cameras with macro lenses. 1Durable Material: Using optical glass, coated hard plastic, aluminum anodized film material, sturdy and durable. 2M67 Thread Adapter: Suitable for all SLR or camera waterproof cases with 67mm/2.6in interface. 3Compression Resistance: Compression depth 60m/196.9ft, can be used for underwater photography sports such as diving and snorkeling. 4Fisheye Lens Cover: Multipurpose lens cover designed for fisheye wide angle lens, which can be installed on various SLR and mirrorless series waterproof shells. 5High Light Transmittance: Optical glass and anti reflection coating design makes the image quality undistorted and the image quality is good. Spherical diameter of 110mm/4.3in gives it excellent edge image quality, which is the choice of users who pay attention to image quality.