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T-ring adapters

YINETTECH T2 to Canon RF adapter (290-EB)

An alloy adapter converting the T2 thread to the Canon RF mount, with no glass inside, for EOS R series mirrorless cameras.

YINETTECH T2 to Canon RF mount adapter

YINETTECH T2 to Canon RF adapter (290-EB)

An alloy adapter converting the T2 thread to the Canon RF mount, with no glass inside, for EOS R series mirrorless cameras.

Camera mount
Canon RF — the EOS R series
T2 thread
T2, named by the maker as M42 × 0.75
Flange distance
Not published by the maker.
Prime focus or projection design
T-ring for a mirrorless mount
Blackening
None, stated outright by the maker
Material
Alloy
Amazon reference
B0G672S7CN (same reference on 6 Amazon marketplaces)
EAN
4894833259447
  • States explicitly that it contains no optics, which is the right claim for a mount adapter
  • Covers the RF mount that the EF-only rings on this shelf exclude
  • No thickness figure, which is part of the flange distance arithmetic

Best for: A Canon EOS R body at the camera end of a telescope imaging train

≈ $14 / £14 / €16
Check price on Amazon

Specifications

Camera mount
Canon RF — the EOS R series
T2 thread
T2, named by the maker as M42 × 0.75
Flange distance
Not published by the maker.
Prime focus or projection design
T-ring for a mirrorless mount
Blackening
None, stated outright by the maker
Material
Alloy
Amazon reference
B0G672S7CN (same reference on 6 Amazon marketplaces)
EAN
4894833259447

The claim worth having

No optical elements. Mount adapters that bridge a flange distance sometimes contain a correcting lens, and that lens alters the image. For astronomy — where the telescope is the optic and nothing else should intervene — a purely mechanical adapter is the right answer, and the maker states it.

The mount that the other rings here exclude

Two T-rings on this shelf name Canon EOS R as incompatible. This one is made for it. The RF mount’s shorter flange distance is exactly why a separate part is needed rather than the same ring with a different face.

The arithmetic behind the thickness

T2 places the sensor 55 mm behind the thread face. RF places it closer to the bayonet than EF does, so the adapter has to be correspondingly thicker. That thickness is not published, and it is the figure that would let the whole train be added up on paper.

What still has to come from elsewhere

The telescope end. This part terminates in a T2 female thread; a nosepiece, a projection adapter or a reducer that ends in T2 male is what connects it to the instrument.

Availability

German, French, Italian and Spanish Amazon stores ran from 16 € to 21 € 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 t-ring adapters

  • Your Day Mate T2 adapter ring for Canon EF and EF-S in black aluminium

    Your Day Mate T2 adapter ring for Canon EF/EF-S (YODM1-1094)

    A slim CNC-machined T2 ring for Canon EF and EF-S bayonets, with the incompatible Canon systems named outright.

    Camera mount
    Canon EOS with EF and EF-S bayonets
    T2 thread
    T2, named by the maker as M42 × 0.75
    Flange distance
    Not published by the maker.
    Prime focus or projection design
    T-ring — converts the T2 thread to a camera bayonet
    Blackening
    Not published by the maker.
    Material
    CNC-machined black anodised aluminium
    Amazon reference
    B0FR59P92W (same reference on 6 Amazon marketplaces)
    EAN
    4252009210942
    • Names the thread precisely as M42 × 0.75 rather than only as “T2”
    • States which Canon systems it does not fit, which prevents the commonest mistake
    • A T-ring alone does not connect a telescope: a nosepiece or adapter is still needed

    Best for: A Canon DSLR with an EF or EF-S bayonet, at the camera end of an imaging train

    ≈ €10
    Check price on Amazon
  • Bresser T2 camera adapter for 1.25 inch eyepiece projection

    Bresser T2 camera adapter 1.25 in (4940100)

    A projection adapter that takes a 1.25 in eyepiece up to 35 mm in diameter and couples it to a camera through a T2 ring bought separately.

    Camera mount
    T2 — a separate T2 ring for the specific camera is required, as the maker states
    T2 thread
    Not published by the maker.
    Flange distance
    31.7 mm (1.25 in) · 35 mm, as the maker publishes it
    Prime focus or projection design
    Eyepiece-projection adapter — the eyepiece stays in the light path
    Blackening
    Not published by the maker.
    Material
    Not published by the maker.
    Amazon reference
    B001BBE3XW (same reference on 6 Amazon marketplaces)
    EAN
    4007922006604
    • The maker states that a separate T2 ring is required rather than implying it is included
    • Maximum eyepiece diameter is published, which decides whether your eyepiece fits inside
    • Eyepiece projection adds an optic and magnifies more than prime focus does

    Best for: Lunar and planetary photography where extra magnification is wanted

    ≈ £39 / €39
    Check price on Amazon
  • EBTOOLS Canon EOS T-ring with 1.25 inch telescope coupling

    EBTOOLS T-ring and 1.25 in coupling for Canon EOS

    A set containing a Canon EOS T-ring and a 1.25 in to M42 coupling, with an inner ring that rotates to orient the camera.

    Camera mount
    A long list of Canon EOS and Rebel models is given in the first bullet
    T2 thread
    Not published by the maker.
    Flange distance
    Not published by the maker.
    Prime focus or projection design
    A T-ring for Canon EOS and a 1.25 in to M42 coupling, per the maker · 1.25 in (31.7 mm)
    Blackening
    Not published by the maker.
    Material
    Anodised aluminium
    Amazon reference
    B07JNSHWX7 (same reference on 5 Amazon marketplaces)
    EAN
    0757686467206
    • Both halves of the chain are supplied together, which is rarer than it should be
    • A rotating inner ring lets the camera be squared to the subject without unthreading
    • The compatibility list contains model names that do not resolve, such as “T4ki” and “Rebeliii1”

    Best for: A Canon EOS owner who wants both halves of the coupling in one purchase

    ≈ £15 / €16
    Check price on Amazon

The rest of this rack

  • Wiltec IP67 universal protective case with cube foam

    Wiltec Universal case 32 × 22.9 × 11.2 cm (65520)

    A rigid IP67 case in polypropylene and glass fibre with cube foam, published with both its external and internal dimensions.

    Internal dimensions
    32 × 22.9 × 11.2 cm, as the maker publishes them · 30 × 19 × 9 cm, as the maker publishes them
    Foam type
    Cube foam, cut to shape by hand
    Shell material
    Polypropylene with glass fibre
    Sealing
    IP67
    Internal dividers
    An internal frame allows dividers without drilling, preserving the IP67 rating
    Load rating
    Not published by the maker.
    Handles
    Not published by the maker.
    Empty weight
    Not published by the maker.
    Latches
    Not published by the maker.
    Amazon reference
    B0DWNFWQ7Z (same reference on 6 Amazon marketplaces)
    EAN
    4251548165232
    • Both external and internal dimensions published, which nothing else on this shelf manages
    • IP67 is a real rating rather than the word “waterproof”
    • Nine centimetres of internal depth will not take a large 2 in eyepiece standing

    Best for: Filters, small eyepieces and a camera, kept dry and dust-free

    ≈ £39 / €33
    Check price on Amazon
  • Fowecry silver-coated telescope cover with fastening strap

    Fowecry Telescope cover 120 × 160 cm

    A washable silver-coated cover of 120 × 160 cm with a base strap, sized by the maker for telescopes up to 1000 mm long and 203 mm of aperture on a mount.

    Fitted size
    120 × 160 cm, as the maker publishes it · Telescopes up to 1000 mm long and 8 in (203 mm) of aperture, on a mount
    Shape
    Not published by the maker.
    Waterproof
    Silver coating, to reflect heat and stop the telescope warming inside · Water-repellent and washable, per the maker · The listing gives none
    UV rating
    Not published by the maker.
    Breathability
    Not published by the maker.
    Venting
    Not published by the maker.
    Closure
    A strap underneath, to close the base against wind
    Tie-downs
    Not published by the maker.
    Seam sealing
    Not published by the maker.
    Packed size
    Not published by the maker.
    Amazon reference
    B0D1C1YJLM (same reference on 5 Amazon marketplaces)
    EAN
    4894950974407
    • Publishes both its own size and the telescope size it suits
    • The silver outer coating addresses daytime heating, not only rain
    • No fabric denier or weight figure

    Best for: Covering an assembled 8 in telescope between sessions, under shelter

    ≈ €14
    Check price on Amazon
  • LNGJIN silver 420D telescope cover

    LNGJIN 420D telescope cover 120 × 165 cm

    A 420D Oxford cover of 120 × 165 cm at a published 546 g, with a silver finish that reflects light and an adjustable fit.

    Fitted size
    165 × 120 cm, as the maker publishes them
    Shape
    Adjustable and retractable, per the maker
    Waterproof
    420D Oxford · Silver, to reflect light and reduce the internal temperature
    UV rating
    Wind, rain and dust proof; described as wear- and tear-resistant
    Breathability
    Not published by the maker.
    Venting
    Not published by the maker.
    Closure
    Not described beyond “wrap tightly”
    Tie-downs
    Not published by the maker.
    Seam sealing
    Not published by the maker.
    Packed size
    546 g, as the maker publishes it
    Amazon reference
    B0DZP5FLC9 (same reference on 6 Amazon marketplaces)
    EAN
    0753980755513
    • The only cover here to publish its own weight
    • Both dimensions and the fabric denier are given
    • The fastening method is never described

    Best for: Covering a telescope at a dark site, where the cover has to be carried there too

    ≈ €16
    Check price on Amazon

All t-ring adapters