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Extension tubes

ZWWAAZHF Spotting scope camera adapter tube

An adapter tube for coupling a DSLR to named SVBONY spotting scopes, assembled by screwing a T-shaped adapter into a T adapter and then into the camera.

ZWWAAZHF spotting scope to DSLR camera adapter tube

ZWWAAZHF Spotting scope camera adapter tube

An adapter tube for coupling a DSLR to named SVBONY spotting scopes, assembled by screwing a T-shaped adapter into a T adapter and then into the camera.

Length
Not published by the maker.
Barrel and thread fittings
Couples a DSLR to a spotting scope · None published
Internal blackening
Not published by the maker.
Clamping method
Not published by the maker.
Rigidity
All metal, per the maker
Material
Not published by the maker.
Amazon reference
B0H41D7DVW (same reference on 1 Amazon marketplace)
EAN
7862780235019
  • Names the exact scope models it is made for rather than claiming universality
  • Addresses focus wheel clearance, which is a real problem with spotting scope adapters
  • No thread designations of any kind are published

Best for: Digiscoping with a named SVBONY spotting scope and a DSLR

≈ €15
Check price on Amazon

Specifications

Length
Not published by the maker.
Barrel and thread fittings
Couples a DSLR to a spotting scope · None published
Internal blackening
Not published by the maker.
Clamping method
Not published by the maker.
Rigidity
All metal, per the maker
Material
Not published by the maker.
Amazon reference
B0H41D7DVW (same reference on 1 Amazon marketplace)
EAN
7862780235019

Named models rather than a universal claim

SV28, SV14, SV13, SV46, SV406, SV411. Naming six specific instruments is far more useful than claiming to fit all spotting scopes, and it is the most reliable statement in this listing.

The clearance note

The maker states that the hollow sections of the sleeve do not obstruct the focusing wheel. On a spotting scope, where focus is adjusted constantly while framing, an adapter that covers the wheel is unusable — and plenty do.

The assembly, in the maker’s own order

The T-shaped adapter screws into the T adapter; the assembly screws into the DSLR; the whole thing attaches to the scope. Following that order matters, because assembling it differently leaves one thread unreachable.

The blanks in the listing

Any thread designation, any length, any weight. For a part whose entire job is to bridge two threads, the absence of both thread specifications is the notable gap.

Availability

German Amazon store sat at about 15 € on the day of the survey.

American, British, French, Italian and Spanish Amazon stores 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 extension tubes

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    An aluminium extension sleeve of 37.5 mm with M68 × 0.75 male and female threads, intended for the 2.5 in HEXAFOC focuser.

    Length
    37.5 mm, from the title
    Barrel and thread fittings
    M68 × 0.75 internal and external, as the maker publishes them
    Internal blackening
    Matt black coated against stray light
    Clamping method
    Not published by the maker.
    Rigidity
    Not published by the maker.
    Material
    Aluminium
    Amazon reference
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    EAN
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    • Both the length and the thread are published, which is everything an extension needs to state
    • M68 is the large-format thread that suits a 2.5 in focuser without narrowing the path
    • M68 × 0.75 is a specialist thread and will need adapters to meet T2 or M48

    Best for: A Bresser HEXAFOC focuser that needs its focal plane moved further out

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    Length
    The listing gives none
    Barrel and thread fittings
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    Internal blackening
    Not published by the maker.
    Clamping method
    Brass compression ring, per the maker
    Rigidity
    Not published by the maker.
    Material
    Anodised aluminium
    Amazon reference
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    EAN
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    • A brass compression ring protects the eyepiece barrel and keeps it centred
    • The conversion almost every 2 in focuser owner needs at some point
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    Length
    50 mm, as the maker publishes it
    Barrel and thread fittings
    2 in · 2 in, at the lower end
    Internal blackening
    Ribbed inside against reflections, black anodised outside
    Clamping method
    2 in spring-ring clamp, per the maker
    Rigidity
    Not published by the maker.
    Material
    Not published by the maker.
    Amazon reference
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    EAN
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    • Publishes the optical path added, which is the only figure that matters for an extension
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The rest of this rack

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    ZGYDNM M54 filter drawer with two slides

    A filter drawer rather than a wheel: two slides carry the filters, and the body threads M54 × 0.75 at both ends.

    Slot count and filter size
    M54 × 0.75 at the telescope end and M54 × 0.75 at the output · Two
    Optical path length
    4 mm is given for the interface and 16 mm as the extended length; both are reproduced as published
    Manual or motorised operation
    A filter drawer — the filters slide in and out, they do not rotate
    Light sealing
    Not published by the maker.
    Power
    Not published by the maker.
    Software support
    Not published by the maker.
    Amazon reference
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    EAN
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    • The listing gives two different thickness figures without saying which is which

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    Reduction factor
    About 0.5x, and the maker states it depends on the spacing
    Required back focus
    85 mm, as the maker publishes it
    Image circle
    22.5 mm, as the maker publishes it
    Corrector function
    Focal reducer with optics — two cemented elements
    Thread standards
    Filter thread on both faces; the maker writes it as 28.5 × 0.75 mm, where the convention on this shelf is M28.5 × 0.6
    Vignetting
    Not published by the maker.
    Housing
    Fully multi-coated, per the maker · Black anodised aluminium
    Amazon reference
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    EAN
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    Check price on Amazon
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    A 2 in nosepiece adapter carrying a T2 male thread for the camera and an M48 internal thread for a filter, with a fully matted bore.

    Reduction factor
    Not published by the maker.
    Required back focus
    Not published by the maker.
    Image circle
    Not published by the maker.
    Corrector function
    Not published by the maker.
    Thread standards
    2 in nosepiece for a 2 in focuser · M42 × 0.75 male — the T2 thread · M48 × 0.75 internal, at the front
    Vignetting
    “Full frame with 2 inch, no dark corners”, as the maker states it
    Housing
    Fully matted internal thread; black hard-anodised outside
    Amazon reference
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    EAN
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All extension tubes