This 7-stop, 4 x 4" NiSi Nano IRND Filter 4x4 7-Stopis a 4mm ND filter with a 128x filter factor that provides a 7-stop exposure reduction. Its 2.1 optical density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. By slowing your exposure time or increasing your aperture, you are able to control depth of field and convey movement more easily. Neutral density filters are intended to not affect the coloration of the image and are ideal for pairing with other filters.

Compatible only with NiSi C4 Filter Holding Kit, the design of this filter has been optimized for use with digital sensors and to promote nearly flat attenuation of visible and infrared light. Due to imaging sensors' greater susceptibility to infrared light, compared to traditional film, color casts can occur when photographing darker subjects that require increased exposure times. 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 4 x 4" Nano IRND 2.1 Filter, one layer of NiSi Optical Nano Coating is applied to each of this filter's surfaces.

This NiSi 4 x 4" Nano IRND 2.1 Filter is constructed from optical glass for clarity as well as color fidelity, and measures 4mm thick.

2.1 Optical Density    NiSi Optical Nano Coating    Optical Glass Construction    Darkens Entire Image    Allows Reduced Shutter Speed    Allows Wider Aperture    Neutral Results, Visible, & IR Spectrums    Includes Leatherette Pouch

Compatibility:
NiSi C4 Cinema Filter Holder Kit for 4mm Filters.

4 x 4" neutral density filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required.

Providing a 7-stop exposure reduction, this filter allows you to control depth of field and convey movement more easily.

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.

Leatherette pouch included for storage and transport.

Related Questions and Answers

Q: 1. is there a particular reason Nisi makes this density in 100x100mm and not 4x4? I need 8 stop ND to complement my Nisi IRND set

A: You can use 100x100 filters. 100x100 is the same as a 4x4 filter.

Q: 2. where made ? china ?

A: I just receive mine, made in China..

Q: 3. What is the warranty on this product?

A: NiSI filters come with 1 year warranty in the US only. They are distributed through Ikan Corp in Texas.

Q: 4. Is the gasket pre-installed?

A: Yes, the gasket is attached to the filter.

Q: 5. Will this fit a Lee Filter holder?

A: Yes.

Q: 6. Do I need holder as well and I used 24-120 and 20mm most if time which one will be fit?

A: You will need a filter holder and step-up or step-down rings depending on your lens filter thread size.

Q: 7. Are theses filter can be hold with the nisi 100mm holder v5 ?

A: Sorry shopper, these Cinema filters will not fit into the V5 Holder.

Q: 8. How many stops would I need to do a long exposure of the direct sunset with a bright reflection off a river? I already have a 3, 6, and 10 and I can't get a past 2 second shutter speed with the 10 stop. Should I stack them or buy the 15 or 20 stop?

A: It is always better to use as few filters in front of the lens as possible so one 20 stop filter would be a better choice.

Q: 9. Does this filter fit on Lee filter holder ?

A: Yes.

Q: 10. does this filter thickness fit into the 4x5.65 filter slots from this mattebox? BH #TIMBT12M114 MFR #MB-T12-M114

A: The Tilta 3-Stage 4 x 5.65" Carbon Fiber Clip-On Matte Box (114mm Back) is a cinema matte box and takes cinema 4mm thick filters. The NiSi 4 x 5.65" Nano IRND 0.3 Filter (1-Stop) is 4mm thick. It will fit.