NiSi 6.6x6.6 Nano Hard IRND0.9Grad HE

The NiSi Nano Hard-Edge Graduated IRND Filter helps to darken specific areas of an image, such as bright skies, while allowing for a normal, unaffected exposure in the other regions of the image. The filter is densest at the edge and tapers to clear by the middle, with a quite sharp edged line of transition between the dense and clear areas. Neutral density filters do not affect the coloration of the image. This filter is normally used when the separation between the bright and the dark areas of the scene is very defined, such as the horizon line or the boundary between sea level and the sky.

The design of this filter has been optimized for use with digital sensors and to promote nearly flat attenuation of visible and infrared light. To provide a high level of neutrality across the visible and infrared spectrums in order to eliminate color casts and ensure cleaner, truer blacks when using the NiSi Nano Hard-Edge Graduated IRND Filter, one layer of NiSi Optical Nano Coating is applied to each of this filter’s surfaces.

This NiSi Nano Hard-Edge Graduated IRND Filter is constructed from optical glass for clarity as well as color fidelity, 
Graduated neutral density filter darkens bright areas of an image, such as skies, while leaving the remainder of the frame unaffected 
Edged line of transition between the dense and clear areas 
Filter does not affect coloration of the image and is ideal for use with other filters 
Each surface includes one layer of NiSi Optical Nano Coating that attenuates infrared light as well as visible wavelengths, to maintain color neutrality and suppress color casts due to increased exposure times 
Constructed from optical glass for clarity 
Scratch resistance 
This filter is 4mm thick