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Moon filters

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.

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

Specifications

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

Three lines, one of which matters

High-quality plane-parallel glass. That is a manufacturing claim about flatness and parallelism, and at the magnifications a Moon filter is used at, flatness is what decides whether the filter degrades the image it is attenuating.

The number that is nowhere

Transmission. Beside it on this shelf sits a filter published at 25 per cent and another adjustable from 1 to 40. This one offers no number, so it cannot be placed against either.

What a Moon filter is for

The Moon in a telescope is genuinely uncomfortable near full phase — bright enough to spoil dark adaptation for a quarter of an hour afterwards. A filter cuts it to a level the eye holds, and contrast along the terminator becomes easier to read.

Buying it

On the maker’s reputation and on the substrate claim, not on a comparison of figures. That is what this listing supports and nothing more.

Availability

German, French, Italian and Spanish Amazon stores ran from 45 € to 52 € on the day of the survey.

American and British Amazon stores list it in local currency, which the euro range above sets aside.

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 moon filters

  • Celestron 94107 variable polarising moon filter

    Celestron Variable Polarizing Moon Filter (94107)

    A two-element polarising filter for 1.25 in eyepieces with transmission adjustable from 1 to 40 per cent by rotating its lower ring.

    Transmission percentage
    1 % to 40 %, adjustable, as the maker publishes it
    Neutral or tinted dimming
    Not published by the maker.
    Fixed or variable design
    Variable polarising filter, threaded for 1.25 in eyepieces · Rotate the lower ring, per the maker · Threaded on both faces, so other filters can be combined with it
    Thread size
    Not published by the maker.
    Glass flatness
    Not published by the maker.
    Cell depth
    Not published by the maker.
    Amazon reference
    B07N99RW5K (same reference on 6 Amazon marketplaces)
    EAN
    0050234941075
    • A published transmission range rather than a single fixed figure or a colour word
    • One filter covers what several fixed neutral filters would
    • A polarising pair costs some light even at its most open setting

    Best for: The Moon across its whole cycle, where a fixed filter is right at only one phase

    ≈ $43 / £42 / €38
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  • 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
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The rest of this rack

  • Semptec telescoping stool with carry strap

    Semptec Urban Survival Technology ZX8711 telescoping stool

    A ten-step telescoping stool rated to 200 kg at a published 982 g, with polypropylene body, polyester strap and a steel tension spring.

    Seat height range
    Ten, as the maker states them
    Adjustment method
    Not published by the maker.
    Steps
    Not published by the maker.
    Load rating
    Up to 200 kg, as the maker states it
    Folded size
    44 × 25 × 25 cm, as the maker publishes them
    Weight
    982 g, as the maker publishes it
    Foot design
    Not published by the maker.
    Seat material
    Polypropylene stool, polyester strap, steel tension spring
    Supplied accessories
    Carry strap · German instructions
    Amazon reference
    B0D9KLZSQZ (same reference on 6 Amazon marketplaces)
    EAN
    4022107434447
    • Under a kilogram, and the figure is published to the gram
    • A 200 kg rating with named materials including a steel spring
    • Ten steps is the coarsest adjustment of the telescoping stools here

    Best for: The best weight-to-rating ratio on this shelf

    ≈ €15
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  • Relaxdays black telescoping stool folded and extended

    Relaxdays Telescoping stool (10049854)

    A folding telescoping stool with a maximum seat height of about 44.5 cm, a 25 cm seat and a folded size of about 6.5 × 25 cm.

    Seat height range
    About 44.5 cm, as the maker publishes it
    Adjustment method
    Not published by the maker.
    Steps
    Not published by the maker.
    Load rating
    About 100 kg, as the maker states it
    Folded size
    44.5 × 25 × 25 cm · About 6.5 × 25 cm, as the maker publishes it · About 25 cm
    Weight
    Not published by the maker.
    Foot design
    Not published by the maker.
    Seat material
    Robust plastic
    Supplied accessories
    Carry strap · A choice is offered
    Amazon reference
    B0DBLPPJRQ (same reference on 6 Amazon marketplaces)
    EAN
    4052025874421
    • Folded dimensions published, which decides whether it fits in a full bag
    • The lowest price on this shelf for a stool with real figures
    • A 100 kg rating is half what two of its rivals here publish

    Best for: A light observer who wants the cheapest stool that still publishes its figures

    ≈ €18
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  • SCOPIFY telescoping observing stool with cushion and bag

    SCOPIFY Telescoping stool with cushion

    A folding telescoping stool with twelve height steps from 6 to 45 cm, a 200 kg rating, a square 25 cm seat, a removable cushion and a carry bag.

    Seat height range
    Twelve, from 6 cm to 45 cm, as the maker publishes them · About 6 cm
    Adjustment method
    Not published by the maker.
    Steps
    Not published by the maker.
    Load rating
    Up to 200 kg, as the maker states it
    Folded size
    Not published by the maker.
    Weight
    About 1.35 kg, as the maker publishes it
    Foot design
    Non-slip underside with a locking system
    Seat material
    Square, 25 × 25 cm, with a removable cushion
    Supplied accessories
    Stool, cushion and carry bag with a shoulder strap
    Amazon reference
    B0CYLG3RSQ (same reference on 5 Amazon marketplaces)
    EAN
    5070002855903
    • Twelve steps over 39 cm of range is the finest adjustment on this shelf
    • The maker publishes a safety instruction rather than only a load figure
    • A square seat is less comfortable than a round one over a long session

    Best for: A Dobsonian observer whose eyepiece height changes with every target

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