The PRO Fisheye Lens Protector from Tadashi fits over fisheye lenses with a diameter of 3.5" or less. The Fisheye Lens Protector is designed to protect the front element of a fisheye lens while shooting close-up extreme sports, or in any shooting situation when protection is required. The protector enables 92% light transmission with less than 2% distortion on the image, and it also causes no vignetting with a 100% unobstructed field of view. This Pro version has been dipped in a military-grade hard coating, which makes it scratch-resistant and more durable than the BASIC version.