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Light pollution filters

K&F CONCEPT Nano-X Natural Night 67 mm

A 67 mm photographic light-pollution filter blocking the 580 to 610 nm region of common artificial lighting, with a 28-layer nano coating on both faces.

K&F Concept Nano-X 67 mm natural night filter

K&F CONCEPT Nano-X Natural Night 67 mm

A 67 mm photographic light-pollution filter blocking the 580 to 610 nm region of common artificial lighting, with a 28-layer nano coating on both faces.

Blocked wavelengths and published curve
Approximately 580 to 610 nm, as the maker publishes it
LED and sodium behaviour
Not published by the maker.
Visual or photographic design
Screw-in filter for a camera lens — not a telescope filter
Colour cast
28 layers, double-sided nano coating per the maker · Japanese optical glass, double-side polished, per the maker
Thread size
67 mm
Focal ratio limits
Not published by the maker.
Amazon reference
B07PG785HC (same reference on 6 Amazon marketplaces)
EAN
6936069223248
  • The blocked region is published as a wavelength range rather than described
  • Double-sided coating reduces the ghosting that plagues bright-light nightscapes
  • It is a camera filter: it will not thread into an eyepiece or a telescope nose

Best for: Wide-field tracked photography with a camera lens under sodium-lit skies

≈ £42 / €55
Check price on Amazon

Specifications

Blocked wavelengths and published curve
Approximately 580 to 610 nm, as the maker publishes it
LED and sodium behaviour
Not published by the maker.
Visual or photographic design
Screw-in filter for a camera lens — not a telescope filter
Colour cast
28 layers, double-sided nano coating per the maker · Japanese optical glass, double-side polished, per the maker
Thread size
67 mm
Focal ratio limits
Not published by the maker.
Amazon reference
B07PG785HC (same reference on 6 Amazon marketplaces)
EAN
6936069223248

A camera filter, filed among telescope ones

Sixty-seven millimetres of screw thread, meant for the front of a camera lens. It appears on this shelf because it is sold as a light-pollution filter, and the first thing to say about it is that it will not fit a telescope.

The specification that is published

A blocked region of roughly 580 to 610 nanometres. That is the sodium region — the orange glow of older street lighting — and stating it as a range is more than most filters here manage.

Where it sits in an astrophotography setup

On a lens, on a camera, on a star tracker. That is the wide-field route into astrophotography, and this filter is aimed squarely at it: the Milky Way over a landscape, with a town on the horizon.

The limit worth knowing

Lighting has changed. Sodium lamps emit in a narrow band that a filter can remove cleanly; white LEDs emit across the whole visible spectrum, and no narrow-band filter can subtract them without taking the subject with them.

Availability

German, French, Italian and Spanish Amazon stores ran from 55 € to 63 € on the day of the survey.

British Amazon store lists it in local currency, which the euro range above sets aside.

American Amazon catalogue holds a record for it that nobody is selling.

Figures as Keepa reported them on the day this page was last updated. Stock and pricing shift without warning.

Prices quoted in this text were read on 17 September 2026. The live price is at the top of the page.

What this fits

More light pollution filters

  • Omegon Pro CLS 2 inch light pollution filter

    Omegon Pro CLS 2 in

    A 2 in broadband CLS filter that the maker states suits telescopes from 70 mm upwards and darkens the object only slightly.

    Blocked wavelengths and published curve
    The listing gives none as wavelengths
    LED and sodium behaviour
    Not published by the maker.
    Visual or photographic design
    CLS broadband filter, 2 in thread
    Colour cast
    Not published by the maker.
    Thread size
    Not published by the maker.
    Focal ratio limits
    From 70 mm, as the maker states it
    Amazon reference
    B016O66DY0 (same reference on 6 Amazon marketplaces)
    EAN
    4049467472919
    • The maker states a minimum aperture, which almost no filter listing does
    • A 2 in thread suits wide-field eyepieces and 2 in focal adapters
    • No wavelengths and no transmission percentage appear anywhere

    Best for: A 2 in eyepiece or focal adapter on a telescope of 70 mm or more, under a town sky

    ≈ £83 / €93
    Check price on Amazon
  • SVBONY 1.25 inch CLS light pollution filter

    SVBONY CLS 1.25 in (FUSF9155A)

    A CLS broadband filter publishing 90 per cent transmission at the hydrogen, oxygen and sulphur lines and 0.1 per cent at the sodium and mercury lines of artificial lighting.

    Blocked wavelengths and published curve
    90 % at Hα 656 nm, O-III 496 and 500 nm, S-II 672 nm and Hβ 486 nm, as the maker publishes it
    LED and sodium behaviour
    0.1 %, named at Na 589 and 578 nm and Hg 435 nm
    Visual or photographic design
    CLS broadband filter, threaded for 1.25 in eyepieces and camera noses
    Colour cast
    Planetary rotation coating system, for uniformity — the maker’s own description
    Thread size
    Not published by the maker.
    Focal ratio limits
    Not published by the maker.
    Amazon reference
    B079BWD595 (same reference on 6 Amazon marketplaces)
    EAN
    0609378745577
    • The only filter on this shelf to publish both in-band and off-band transmission with named wavelengths
    • The blocked lines are named by element, which is what allows the claim to be checked against physics
    • A broadband filter helps less than a narrowband one under heavy light pollution

    Best for: Imaging or observing emission nebulae from a town, with a colour camera or by eye

    ≈ $32 / €46
    Check price on Amazon

The rest of this rack

  • Omegon Premium 2 inch moon filter with 25 per cent transmission

    Omegon Premium Moon Filter 25 % 2 in

    A neutral grey Moon filter passing 25 per cent of the light, threaded for 2 in eyepieces, intended to dim the Moon without tinting it.

    Transmission percentage
    25 %, as the maker publishes it
    Neutral or tinted dimming
    Neutral — the Moon keeps its natural appearance, per the maker
    Fixed or variable design
    Neutral grey filter, threaded for 2 in eyepieces
    Thread size
    2 in filter thread
    Glass flatness
    Not published by the maker.
    Cell depth
    Not published by the maker.
    Amazon reference
    B018TN4TCO (same reference on 6 Amazon marketplaces)
    EAN
    4049467474043
    • The transmission is published as a percentage rather than a word
    • Neutral rather than tinted, so lunar colour is not altered
    • A single fixed value suits one range of phases and apertures

    Best for: A wide-field 2 in eyepiece used on the Moon at first or last quarter

    ≈ €39
    Check price on Amazon
  • Vixen 1.25 inch moon filter

    Vixen Moon filter 1.25 in (37222-5)

    A plane-parallel Moon filter that screws into 1.25 in eyepieces, sold on the quality of its substrate rather than on a stated transmission.

    Transmission percentage
    The listing gives none anywhere in the listing
    Neutral or tinted dimming
    Not published by the maker.
    Fixed or variable design
    Moon filter, threaded for 1.25 in eyepieces
    Thread size
    Not published by the maker.
    Glass flatness
    High-quality plane-parallel glass, as the maker states it
    Cell depth
    Not published by the maker.
    Amazon reference
    B0018HILMI (same reference on 6 Amazon marketplaces)
    EAN
    4955295372225
    • Plane-parallel glass is the property that keeps the image sharp at high magnification
    • A 1.25 in thread fits the eyepiece size almost everyone owns
    • No transmission percentage, so it cannot be compared with the filters beside it

    Best for: A 1.25 in eyepiece case where substrate quality matters more than a published figure

    ≈ $54 / £42 / €45
    Check price on Amazon
  • Diealles Shine black telescoping folding stool

    Diealles Shine Telescoping folding stool

    A polypropylene telescoping stool with a carry strap, described in five bullets that contain no measurement at all.

    Seat height range
    The listing gives none
    Adjustment method
    Not published by the maker.
    Steps
    The listing gives none
    Load rating
    The listing gives none — described as a large capacity
    Folded size
    The listing gives none
    Weight
    The listing gives none
    Foot design
    Not published by the maker.
    Seat material
    Polypropylene, described as an upgraded version
    Supplied accessories
    Supplied straps for hand or shoulder
    Amazon reference
    B0BWF25TX6 (same reference on 5 Amazon marketplaces)
    EAN
    0788135722737
    • The same telescoping principle as its better-documented rivals
    • Carry straps are supplied rather than sold separately
    • Not one measurement appears anywhere in the listing

    Best for: Nobody who has not seen one in person or measured what they need

    ≈ €20
    Check price on Amazon

All light pollution filters