An innovation for quick shooting. Only push in to mount. You will be ready to shoot at cyberspeed and can't miss the best shutter timing anymore. Hard rubber balls hold frame tight on your lens. Can rotate both ways smoothly. The best effect position can be found without stress.
Blocks ultraviolet rays. Ulrtaviolet rays make your pictures blue, and photographs taken with monochrome films hazy. Most effective for distant objects. A "MUST" filters for shooting in coastal and mountainous areas in fine weathers.