This 2-stop, 4 x 4" NiSi Nano IRND Filter is a 4mm ND filter with a 4x filter factor that provides a 2-stop exposure reduction. Its 0.6 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 0.6 Filter, one layer of NiSi Optical Nano Coating is applied to each of this filter's surfaces.

This NiSi 4 x 4" Nano IRND 0.6 Filter is constructed from optical glass for clarity as well as color fidelity, and measures 4mm thick.

0.6 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 2-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. Since this filter uses polarizing material, I wonder if it can be used as a polarizer?

A: No,NiSi True Color ND-VARIO Pro Nano 1 to 5-Stop Variable ND Filter (58mm) does not have polarizing effects. This filter will only add 1-5 stops darker to your exposure. If you need a 58mm polarizing filter please open the link below. NiSi 58mm True Color Pro Nano Circular Polarizing Filter BH #NICPLTCPN58 • MFR #NIR-TCCPL-58 https://www.bhphotovideo.com/c/product/1706867-REG/nisi_nir_tccpl_58_58mm_true_color_pro.html

Q: 2. Is the color rendition of this NISI 6 stop ND filter truly neutral?

A: Yes the filter is neutral and does not have any color shift.

Q: 3. Does the 43mm filter have 43mm filter threads int he front of it? Or like the 82,, does it have larger 86mm filter threads in?

A: The NiSi True Color ND-VARIO Pro Nano 1 to 5-Stop Variable ND Filter (43mm) has 43mm rear filter threads and 46mm front threads.

Q: 4. 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: 5. Does the filter have a threaded front element to allow for additional filter be threaded on the front?

A: The NiSi 82mm True Color ND-VARIO Pro Nano 1-5 Stop Variable Neutral Density Filter has 86mm front threads. The 86mm front filter thread is larger than the rear thread to reduce the chance of vignetting on wide-angle lenses. It is recommended that this filter is used on 35mm or longer focal lengths lenses.

Q: 6. 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.

Q: 7. I use the NiSi 100mm Filter Holder for Nikon Z 14-24mm f/2.8 S Lens. Is this filter compatible.with that holder?

A: Yes, you can use the NiSi 100 x 100mm Explorer IRND 3.0 Filter with the NiSi 100mm Filter Holder for the Nikon Z 14-24mm f/2.8 S Lens.

Q: 8. will this fit in a drop in filter tray for canon L glass, like the 200-400 f4? Provided you take off the thumb stud.

A: Unfortunately, the NiSi True Color ND-VARIO Pro Nano 1 to 5-Stop Variable ND Filter (52mm) will not fit in that lens. To fit in a drop-in filter holder, the filter needs to be very thin, the front has to be the same diameter as the back, and the filter cannot have the knurling on the outside of the filter.

Q: 9. 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: 10. 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.