The NiSi 6.6x6.6" Natural-Night Cinema Filteris designed to reduce the appearance of light pollution in video or images that include the night sky and illumination from artificial light sources. This effect can be obtained when this filter is used on a film camera system with daylight film installed, or on a digital camera system with its daylight white balance setting selected.

Light pollution occurs in areas of the night sky that are above or near concentrated and intense sources of artificial light such as cities. These light sources can include exterior and interior lamps for commercial or residential buildings, brightly lit advertisements such as billboards, streetlamps, as well as sports and entertainment venues. Together, they can result in a type of light pollution known as skyglow, where individual stars, the Milky Way, and other astronomical features in the night sky are obscured. Additionally, artificial lights clustered together can become difficult to individually discern. Light pollution from these "cluttered" sources can become a source of distraction within an image and can resemble overexposed areas of glare.

When used, the NiSi 6.6 x 6.6" Natural-Night Cinema Filter can improve the results of nighttime images by blocking the yellow light from sodium-vapor lamps, mercury-vapor lamps, or low Color Rendering Index LED's, common light sources within urban areas. By preventing the dominant wavelengths of light associated with the color of those lamps from being recorded, the visibility of astronomical objects is enhanced, and where they appear, artificial light sources are more clearly defined with less glare and improved contrast.

This filter is compatible with filter holders that can accommodate 4mm-thick, 6.6 x 6.6" rectangular filters and is constructed from optical glass for clarity as well as color fidelity. Each glass surface includes one layer of nano coating. The nano coating associated with this filter results in an improved beading effect when in contact with water or oil for greater cleaning efficiency.

A leatherette pouch is included with this filter for storage and transport.

Reduces Light Pollution in Night Sky    Blocks Yellow Sodium-Vapor Light    Blocks Yellow Mercury-Vapor Light    Blocks Yellow Light from Low CRI LED's    1.5-2.8x Filter Factor, 0.6 to 1.5 Stop    H-K9L Optical Glass Construction    Nano Coating    4mm-Thick    Leatherette Pouch

• Compatible with filter holders that can accommodate 4mm-thick, 6.6 x 6.6" rectangular filters
• Reduces the appearance of light pollution in video or images that include the night sky and illumination from artificial light sources
• For cameras with daylight film installed, or a digital camera system with its daylight white balance setting selected
• Blocks the yellow light from sodium-vapor lamps, mercury-vapor lamps, or low Color Rendering Index LED's, common light sources within urban areas
• Enhances the visibility of astronomical objects, and where they appear, artificial light sources are more clearly defined with less glare and improved contrast
• 1.5 to 2.8x filter factor reduces exposure by 0.6 to 1.5 stops
• Constructed from optical glass for clarity
• Each glass surface includes one layer of nano coating that results in an improved beading effect when in contact with water or oil for greater cleaning efficiency
• Leatherette pouch included for storage and transport

Related Questions and Answers

Q: 1. does this filter pass 5577 angstroms? I wish to pass 5577 for auroral photography, but otherwise block Na 5890 & other street lamp emissions. Maybe i can get a transmission spectrum for this filter? Otherwise, can you recommend an ideal auroral/light pollution filter? thank you.

A: Unfortunately, for whatever reason NiSI does not list the angstroms for this filter. However, I would take their word that it is: Reduces Light Pollution in Night Sky, Blocks Yellow Sodium-Vapor Light, Blocks Yellow Mercury-Vapor Light, and Blocks Yellow Light from Low CRI LEDs. If it does not, they will lose customers.

Q: 2. Is it affective?

A: Yes, this filter works very well to reduce light pollution and produce cleaner sharper images.

Q: 3. Does this fit the NiSi 100mm Filter Holder for Sony FE 14mm f/1.8 GM Lens?

A: Yes, the NiSi 100 x 100mm Natural Night Light Pollution Filter would be compatible for use inside the NiSi 100mm Filter Holder for Sony FE 14mm f/1.8 GM Lens.

Q: 4. Will this work with the Sigma A00090 Rear Filter Holder?

A: Hi--that filter holder is only compatible with two Sigma filters; it's not compatible with this filter.

Q: 5. Does anyone compares this Nisi Natural night filter with Breakthrough photography "Autumn & Night Sky" filter?

A: The NiSi is a great filter. High quality and it's sharp. It does have a pink-ish color cast while the Breakthrough Photography is more warm and sometimes orange-ish. Both are really good filters though.

Q: 6. I have the LEE Filters LEE100 Filter Holder, it is posible to use it with this filter?

A: Hi--yes, this filter will fit in the Lee100 filter holder.

Q: 7. Is this compatible with LEE Filters SW150 Mark II Filter System Holder for Wide-Angle Lenses?

A: The NiSi 150 x 150mm Natural Night Light Pollution Filter is compatible with the LEE Filters SW150 Mark II Filter System Holder for Wide-Angle Lenses.

Q: 8. I saw that there is another version of this filter with an aluminum frame. What is the frame of this filter made of?

A: The NiSi 72mm Natural Night Filter ring is made out of aluminum.

Q: 9. is this filter necessary for nighttime videography? And is it worth buying this filter for video or you can do all of the color adjustments in post where you could remove the light pollution and grade to a natural night color?

A: If are shooting on locations at night with light pollution it is best to use a filter like the NiSi 67mm Natural Night Filter. editing in post will not be as good.

Q: 10. how do I know what to choose? 100x100 or 150mmx150 or 180x180mm? I don't have a holder yet either, so want to get everything to fit my 62mm ring lens and my 67mm lens ring

A: Hi--many filters will fit in a standard 100x100mm filter holder (probably the most common filter size); you need to choose among the filter holders (you will also need a compatible adapter ring for the lens you're using): https://www.bhphotovideo.com/c/search?q=filter%20holders&filters=fct_category%3Afilter_holders_3837%2Cfct_filter-system_2715%3A4in-100mm-wide-filters