Hard Edge ND grads feature a neutral gray effect at the top of the filter that sharply transitions to clear at the center of the filter. The main function of a graduated ND is to balance the luminosity of the sky to the terrain below. The hard edge grad primarily used in photos that feature a defined and uninterrupted horizon, such as a seascape. Formatt-Hitech filters are made from the highest quality 4mm Schott Superwite glass.
- Graduated filters have an effect that occurs on one area of the filter and transitions to clear on other areas of the filter
- Typically graduated filters are used to enhance the sky or terrain, or balance the luminosity of the sky to the luminosity of the terrain
- For hard and soft grad filters, colors are often deployed (such as sunset or twilight) to enhance the color of the sky
- Formatt-Hitech offers four varieties of graduated neutral density filters:
- Soft edge grad
- Hard edge grad
- Reverse grad