Helps protect the surface of the Century Precision Optics 0.3X Ultra Fisheye Adapter MKII (Mark 2) and is compatible with the Opteka 0.3X HD Ultra Fisheye Lens Adapter 52mm, 58mm, 62mm, and 72mm mount lenses.

-100% unobstructed field of view (no vignetting).
-Attaches via a rubber band that goes into four slots in the corners.
-Outside (convex side) coated with scratch resistant hard coating.
-Lens hood must be removed for proper attachment of filter.
*Item includes: 1 microfiber carrying pouch, 1 attaching rubber band, and an extra rubber band.