Neutral Density (or ND) filters produce a grey neutral effect and are used to reduce light in photography, enabling more control over exposure and depth of field without affecting color or contrast.

ProStop filters are a specialist range of high density ND's used to create motion blur in long exposure shots and can help create startling effects in water, cloud and other moving objects.

Introducing the new ProStop IRND from Formatt-Hitech. ProStop, the world's best selling high density ND filter, has been optimized for digital sensors and reformulated with a nearly flat attenuation of both visible spectrum light and infrared light. This means it's the world's most neutral ND filter, especially at higher densities where other brands suffer from colorcast.

When measured on a spectrograph, ProStop IRND's performance is literally off the charts. The attenuation of light between the visible, near-infrared, and infrared spectrums is even. This means that dark areas of your image are rendered with crisp clean blacks, giving you the absolute maximum performance from your high-native ISO digital sensors. The greater reduction in colorcast also means that photographers and cinematographers can use calibrated sets of filters, and switch between filter densities without disrupting the color balance, and consequently the overall look, of the project.

The ProStop IRND is an excellent choice for fine art photographers creating long exposures. The ProStop IRND is also a terrific choice for filmmakers who want create a cinematic look and reduce IR contamination at the same time.

Features

• Fits the Formatt-Hitech 67mm holder system
• 10-Stop Neutral Density Filter
• Resin ProStop IRND filters are 1.5mm thick
• Extremely even visible and infrared attenuation to eliminate infrared contamination on your digital sensor.
• The best choice for cinematographers needing a matching set of ND with IR protection.
• Perfect for creating shallow depth of field or lengthening exposure times.
• Formulated to eliminate colorcast in the darkest densities.
• Manufactured to scientific tolerances from the highest grade of optical resin or Schott Superwite glass.
• 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
• Made in the UK using the world's most advanced, computer-controlled filter manufacturing technologies.

Why ProStop IRND?

Unlike film, today's digital sensors are adversely affected by light outside of the visible spectrum - especially when using higher density ND filters. Infrared contamination causes black areas of the image to appear various shades of brown and purple. For extremely dark attenuation (16 stops for example used in fine art) infrared contamination will brighten the foliage to the point that the images appear as if they were taken with Infrared Film. The ProStop IRND filter is designed to eliminate the infrared contamination, increasing the quality and contrast of your images and allows you to shoot wide open during daytime with high sensitivity sensors with beautiful results. Images have been created with 6 minute exposures that have zero color shift! ProStop IRNDs are formulated to work with all popular digital cameras without the need for choosing a filter with IR filtration at one specific nanometer cutoff. This is due to the extremely even attenuation across the infrared spectrum.