Hoya has today launched their new ProND Graduated neutral density filters. Like all graduated ND filters, they’re designed to help you darken down the brighter area of sky in your image in order to help get a more even exposure with retained highlights and shadows.
The new Hoya ProND Graduated filters, though, aren’t your usual graduated NDs. These aren’t square format ones that you slot into a holder. They’re round screw-on filters, that can rotate to let you get the angle you wish (much like a circular polariser or variable ND).