Hard Edge graduated filters have a fairly even density of effect across one area of the filter that transitions distinctly to the clear area of the filter.

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.

Roughly speaking soft edge grad filters are for wide angle lenses and hard edge filters are for longer lenses. This gives the most visually attractive effect transition at the horizon line. With the transition placed carefully on the horizon, the hard edge grad is one of the most effect tools available for balancing a bright sky to a dark terrain and is an essential tool for both fine art photographers and professional cinematographers alike.

Features

• Chamfered corners to minimize breakage and maximize the lifespan of the product.
• Generally, use soft grads for wide lenses and hard grads for long lenses.
• Fits the Formatt-Hitech 67mm holder system, so a single filter is usable on multiple lenses
• Made from the highest quality optical resin available, with an index of refraction nearly identical to the finest optical glass
• High scratch resistance, low material fatigue, and chamfered corners to resist breakage so the filter will provide years of service
• Manufactured in the UK to scientific standards using the highest grade of optical resin or Schott Superwite glass.