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Square 100mm optical glass filter with nano coating

iKan

iKan 100mm Natural Night Filter

SKU CH-Q6SV-8JAYT

Blocks light-pollution wavelengths for clearer night-sky photography using 100mm optical glass with nano coating

  • Blocks common light-pollution wavelengths for truer night colours
  • H-K9L optical glass with dual-sided nano coating reduces reflections
  • Precision 100x100mm size fits standard filter holders securely
  • Nano coating repels water, dust and oil for easy cleaning
  • Single-piece construction resists scratches during outdoor use

100mm Natural Night Filter

This 100mm square filter is designed for night-time photography and astrophotography. It uses H-K9L optical glass with dual-sided nano coating to reduce reflections, ghosting and flare. The coating also repels water, dust and oil for easier cleaning in the field. It fits standard 100mm filter holder systems.

Landscape and astro photographers

Photographers shooting city nightscapes or the Milky Way benefit from the filter's ability to block mercury vapor, sodium and low-CRI LED wavelengths. It restores natural colour balance and contrast under light-polluted skies. Shooters who work exclusively in controlled studio lighting or bright daylight will not need this specialised filter.

Blocks common light-pollution wavelengths

The filter selectively blocks the dominant wavelengths emitted by mercury vapor, sodium and low-CRI LED streetlights. This targeted filtration preserves desired colour tones while suppressing the orange and green glow that washes out night skies. Compatibility with a specific holder system depends on the 100mm square format.

How it compares

Measured against everything we stock in Binoculars, Scopes & Sights, at today’s prices. Recalculated every night.

Price $144.99
Pricier than about 60% of the 1,401 comparable items (median $93.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the 100mm Natural Night Filter, and what step do people often get wrong?

Slide the filter into a standard 100mm square filter holder until it seats fully; the common mistake is leaving a gap that lets stray light leak around the edges.

What maintenance or replacement will the 100mm Natural Night Filter need later?

The dual-sided nano coating resists scratches and repels water, dust and oil, so routine cleaning with a soft cloth is all that is required; no scheduled replacement is needed.

What limit shows up first when using the 100mm Natural Night Filter for long night exposures?

The filter selectively blocks mercury vapor, sodium and low-CRI LED wavelengths while maximising transmission of other light, so the practical limit is the ambient pollution spectrum not covered by its blocking bands.

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