The 3-stop, 150 x 170mm NiSi Nano Hard-Edge Graduated IRND Filter 150x170mm 3-Stopfrom NiSi has a rectangular shape and helps darken specific areas of an image, such as bright skies, while allowing for normal, unaffected exposure in other parts of the image. The filter is densest at the edge and tapers to clear by the middle, with a hard-edged line of transition between the dense and clear areas. A neutral density filter with a hard-edged line of transition is particularly useful for images that feature a prominent horizon, or any hard transition between the sky and land. Neutral density filters do not affect the coloration of the image and this filter provides up to a 3-stop reduction in light from entering the lens.

Constructed from optical glass for clarity as well as color fidelity, 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 to eliminate color casts and ensure cleaner, truer blacks, NiSi Optical Nano Coating is applied to each of this filter's surfaces. The Nano coating associated with this filter also results in an improved beading effect when in contact with water or oil for greater cleaning efficiency. This filter is 2mm thick and fits most filter holder systems that are 150mm wide.

0.9 Optical Density    NiSi Optical Nano Coating    2mm Thick Optical Glass Construction    Rectangular Orientation    Reduce Exposure in Selective Areas    Allows Reduced Shutter Speed    Allows Wider Aperture    Neutral Results, Visible, & IR Spectrums    Includes Leatherette Pouch

150 x 170mm graduated neutral density filter darkens bright areas of an image, such as skies, while leaving the remainder of the frame unaffected.

8x filter factor provides up to a 3-stop reduction of light in selective areas.

Hard-edged line of transition between the dense and clear areas.

Useful for images that feature horizons, or any hard transition between the sky and land.

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.

Nano coating provides an improved beading effect with water or oil for more efficient cleaning.

Constructed from optical glass for clarity.

Leatherette pouch included for storage and transport.

Related Questions and Answers

Q: 1. Does this filter come in a metal case similar to the 150mm Lee filters?

A: The NiSi Explorer Collection 150x170mm Nano IR Medium Graduated 3-Stop ND Filter only comes with a soft case.

Q: 2. Will the 105mm fit the Canon CN-E 15.5 - 47mm?

A: The NiSi True Color ND-VARIO Pro Nano 1 to 5-Stop Variable ND Filter (105mm) will fit the Canon CN-E 15.5-47mm T2.8 L S Wide-Angle Cinema Zoom Lens with EF Mount.

Q: 3. I have the V5 set. If these have the gasket pre-installed, can they be stacked or used in the outer slots with one in the nearest slot?

A: You cannot stack more than 1 filter in each slot.

Q: 4. What's the difference between Nisi Explorer and Nisi Nano IRND filter ? which one is better !

A: The Explorer model would be comprised of Schott B270 Glass for impact resistance and better clarity over the Nano model.

Q: 5. Does this go with the NiSi 82mm Swift VND Mist Kit 1-9 Stops (1-5-Stop VND, 4-Stop ND, Black Mist 1/4)?

A: The NiSi 82mm HUC PRO Nano IRND 1.8 Filter (6-Stop) can be used on any lens or filter that has an 82mm filter thread. It does not use the Nisi Swift Friction Mount System.

Q: 6. Does this filter fit inside Tilta Mini Matte Box 82mm adapter ring?

A: Yes.

Q: 7. How does this "Explorer" differ from the "Nano"?

A: The explorer is also Nano but NiSi Explorer filters are constructed from tempered Schott B270 glass for shock resistance as well as increased optical clarity and color fidelity.

Q: 8. when the 6-9 ND comes out, can it be COMBINED with the 1-5 (=14)? with threads or friction: will i need 86mm to put with 82 1-5?

A: No, you can not combine the NiSi True Color ND-VARIO Pro Nano 1 to 5-Stop Variable ND Filter (82mm) with another variable nd filter.

Q: 9. 4mm glass is for Nisi V5 system?

A: Nisi V5 uses 100x100mm by 2mm thick filters.

Q: 10. Are these the same glass as that found on their cine versions?

A: I contacted NiSi concerning your inquiry. According to the manufacturer, yes, the NiSi 77mm HUC PRO Nano IRND 1.8 Filter (6-Stop) uses the same optical grade glass as used in their standard square filters and their Cinema line filters. They state the only filters in their inventory that use B270 Schott glass would be the filters in their 100mm wide Explorer line, which are not available in the circular format.