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Solar filters

POFET Eyepiece-end solar filter

A 1 in aluminium-celled solar filter that screws onto the eyepiece end of the light path rather than over the telescope’s aperture.

POFET 1 inch eyepiece-end solar filter in aluminium cell

POFET Eyepiece-end solar filter

A 1 in aluminium-celled solar filter that screws onto the eyepiece end of the light path rather than over the telescope’s aperture.

Cell fit and outside diameter
2.5 cm (1 in), from the title
Film or glass construction
Threads onto an eyepiece — it does not fit over the front of the telescope · Aluminium alloy with a standard thread, per the maker · The listing gives none anywhere in the listing
Cited standard
The listing gives none anywhere in the listing
Mounting security
Not published by the maker.
Image colour
Not published by the maker.
Supplied storage
Not published by the maker.
Amazon reference
B08M9HY7DC (same reference on 5 Amazon marketplaces)
EAN
0703355530153
  • An aluminium cell rather than a plastic one
  • A standard thread means it will engage a normal eyepiece barrel
  • No density, no transmission and no waveband figure of any kind is published

Best for: Nobody, until the manufacturer’s own instructions and specification have been read

≈ £7
Check price on Amazon

Specifications

Cell fit and outside diameter
2.5 cm (1 in), from the title
Film or glass construction
Threads onto an eyepiece — it does not fit over the front of the telescope · Aluminium alloy with a standard thread, per the maker · The listing gives none anywhere in the listing
Cited standard
The listing gives none anywhere in the listing
Mounting security
Not published by the maker.
Image colour
Not published by the maker.
Supplied storage
Not published by the maker.
Amazon reference
B08M9HY7DC (same reference on 5 Amazon marketplaces)
EAN
0703355530153

What it is, exactly

A small filter in an aluminium cell with a standard thread, intended to screw onto an eyepiece. That places it in a different category from every other solar filter on this shelf, all of which fit over the front of the telescope.

What this listing gives about it as a filter

Nothing. There is no optical density, no transmission figure, no waveband and no reference to any manufacturer specification. Three of the five bullets describe a front focusing handwheel and a wide field of view — properties of an eyepiece, not of a filter.

The site’s position, stated plainly

This site does not tell readers that a filter makes solar observation safe. It reports what the manufacturer publishes and refers to the instructions supplied with the product. Where a manufacturer publishes nothing, that is what this page records.

Where to read instead

The standards page on this site sets out what ISO 12312-2 covers by its own title — filters for direct observation of the Sun by the unaided eye — and why filters intended for instruments are a separate category following their own makers’ specifications.

Availability

German, French, Italian and Spanish Amazon stores ran from 17 € to 24 € on the day of the survey.

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

American Amazon store gave no result whatever, so the buy button there opens a search rather than an empty page.

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 solar filters

  • Omegon full-aperture solar filter in its moulded plastic frame

    Omegon Solar filter for 114 mm telescopes

    A full-aperture solar filter supplied ready-mounted in a moulded plastic frame with an ND5 solar film, made to push directly onto Omegon Basic telescopes.

    Cell fit and outside diameter
    Omegon Basic telescopes, 114 mm; the maker adds “or comparable models” · The listing gives none as a figure
    Film or glass construction
    Full-aperture filter — it fits over the front of the telescope · Solar film with a filter factor of ND5, as the maker states it · Moulded plastic, supplied already assembled
    Cited standard
    Not published by the maker.
    Mounting security
    None, per the maker
    Image colour
    Not published by the maker.
    Supplied storage
    Not published by the maker.
    Amazon reference
    B012FT844C (same reference on 5 Amazon marketplaces)
    EAN
    4049467457879
    • Supplied ready-assembled, so there is no film to cut or mount
    • The film density is named as ND5 rather than described
    • No tube outside diameter figure is published — only a model family

    Best for: An Omegon Basic 114 mm, or a tube whose front diameter has been checked against one

    ≈ £28 / €29
    Check price on Amazon
  • ZBIianxer solar film sheet for telescope use

    ZBIianxer Solar film sheet

    A solar film sheet sold on portability, with neither an aperture range nor an optical density anywhere in the listing.

    Cell fit and outside diameter
    The listing gives none anywhere in the listing
    Film or glass construction
    Solar film sold as a sheet — mounting is the buyer’s job · The listing gives none anywhere in the listing
    Cited standard
    Not published by the maker.
    Mounting security
    Not published by the maker.
    Image colour
    Reddish-yellow Sun, as the maker states it
    Supplied storage
    Not published by the maker.
    Amazon reference
    B0H4DKVQW1 (same reference on 6 Amazon marketplaces)
    EAN
    7614593103883
    • Film can be cut to whatever aperture the buyer needs
    • The maker mentions cleaning with a cloth or water, which most film listings do not
    • Neither a size nor a density is published — two omissions where one would be too many

    Best for: Nobody who has not already decided what density and size they need

    ≈ €53
    Check price on Amazon
  • GMBYLBY solar film sheet for telescope apertures

    GMBYLBY Solar film sheet 80–250 mm

    A sheet of solar filter film covering telescope apertures from 80 to 250 mm, sold as material to be mounted by the buyer.

    Cell fit and outside diameter
    80 to 250 mm, from the title
    Film or glass construction
    Solar film sold as a sheet — mounting is the buyer’s job · The listing gives none anywhere in the listing
    Cited standard
    Not published by the maker.
    Mounting security
    Not published by the maker.
    Image colour
    Reddish-yellow Sun, as the maker states it
    Supplied storage
    Not published by the maker.
    Amazon reference
    B0HD5JWVZL (same reference on 1 Amazon marketplace)
    EAN
    7750300370749
    • A sheet covers a range of apertures rather than one tube
    • Film is the least expensive way to cover a large aperture
    • No optical density figure is published, which is the defining specification of solar film

    Best for: Somebody equipped to build and check a filter cell themselves

    ≈ €30
    Check price on Amazon

The rest of this rack

  • SVBONY 1.25 inch M42 telescope camera projection adapter

    SVBONY 1.25 in M42 projection adapter

    A 1.25 in projection adapter with an extended 68 mm barrel carrying M42 × 0.75 threads on both the inside and the outside, fully threaded internally against reflections.

    Camera mount
    Canon EOS and Rebel SLR and DSLR with a T2 ring; the maker excludes EOS-M models
    T2 thread
    M42 × 0.75 both male and female
    Flange distance
    68 mm extended, as the maker publishes it
    Prime focus or projection design
    Projection adapter with an extension barrel · 1.25 in
    Blackening
    Fully threaded inside to minimise reflections, per the maker
    Material
    All metal aluminium
    Amazon reference
    B01LWJ2Z3Y (same reference on 5 Amazon marketplaces)
    EAN
    0608560842070
    • Publishes the barrel length, which is what enters the back focus calculation
    • Fully threaded inside, which is a stronger anti-reflection measure than matt paint
    • A 68 mm barrel consumes a great deal of focuser travel

    Best for: Eyepiece projection on a telescope with generous focuser travel

    ≈ £17 / €20
    Check price on Amazon
  • Walimex pro T2 to M42 mount adapter ring

    Walimex pro T2 adapter for M42 mount (23367)

    A mechanical transition ring letting T2-threaded telescopes and accessories be fitted to a camera with an M42 screw mount, with manual focus only.

    Camera mount
    T2 equipment onto an M42-mount camera — the reverse of a standard astronomy T-ring
    T2 thread
    The pitches of the two threads are not published
    Flange distance
    Not published by the maker.
    Prime focus or projection design
    Purely mechanical transition ring, per the maker
    Blackening
    Not published by the maker.
    Material
    Not published by the maker.
    Amazon reference
    B0C6DYVMGG (same reference on 6 Amazon marketplaces)
    EAN
    4056929233674
    • The maker is explicit that it carries no contacts and gives manual focus only
    • Names bellows and microscope adapters as well as telescopes
    • It goes the opposite way from a normal astronomy T-ring, which is easy to misread

    Best for: An M42 screw-mount camera body used with T2 astronomical or laboratory equipment

    ≈ £27 / €20
    Check price on Amazon
  • VBESTLIFE 2 inch T2 telescope adapter ring

    VBESTLIFE T2 adapter ring, 2 in

    A 2 in T2 adapter ring in all-metal construction, with an internal surface pattern intended to cut reflections.

    Camera mount
    Not published by the maker.
    T2 thread
    Not stated
    Flange distance
    Not published by the maker.
    Prime focus or projection design
    T2 adapter with a 2 in telescope fitting · 2 in eyepiece diameter, per the maker
    Blackening
    A pattern inside the ring to reduce reflection, per the maker
    Material
    All-metal precision, per the maker
    Amazon reference
    B0824YGXF1 (same reference on 5 Amazon marketplaces)
    EAN
    0738586139776
    • A 2 in fitting rather than 1.25 in, which suits larger focusers and sensors
    • The internal anti-reflection pattern is mentioned rather than ignored
    • No thread pitch, no length, no weight and no clear aperture

    Best for: A 2 in focuser and a T2-threaded camera, where the details will be measured on arrival

    ≈ £13 / €25
    Check price on Amazon

All solar filters