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Counterweights

Sky-Watcher Star Adventurer counterweight kit (S20540)

A counterweight and threaded shaft kit for the Star Adventurer, explicitly excluding the GTi version, with two mutually inconsistent weight figures.

Sky-Watcher Star Adventurer counterweight kit in black

Sky-Watcher Star Adventurer counterweight kit (S20540)

A counterweight and threaded shaft kit for the Star Adventurer, explicitly excluding the GTi version, with two mutually inconsistent weight figures.

Mass
The listing prints 11.3 kg
Bore diameter
The listing gives none
Locking method
Not published by the maker.
Coating
Not published by the maker.
Finish
Not published by the maker.
Compatible mounts
A counterweight with a threaded counterweight shaft · Star Adventurer · Star Adventurer GTi, stated by the maker
Overall dimensions
Not published by the maker.
Amazon reference
B00XX646MG (same reference on 6 Amazon marketplaces)
EAN
0050234205405
  • The shaft is included, not just the weight
  • The incompatible model is named outright, which prevents a common mistake
  • The two published weights are inconsistent with each other

Best for: A Star Adventurer carrying a lens heavy enough to need balancing

≈ $40 / £44 / €55
Check price on Amazon

Specifications

Mass
The listing prints 11.3 kg
Bore diameter
The listing gives none
Locking method
Not published by the maker.
Coating
Not published by the maker.
Finish
Not published by the maker.
Compatible mounts
A counterweight with a threaded counterweight shaft · Star Adventurer · Star Adventurer GTi, stated by the maker
Overall dimensions
Not published by the maker.
Amazon reference
B00XX646MG (same reference on 6 Amazon marketplaces)
EAN
0050234205405

A kit, not just a weight

The counterweight and its threaded shaft together. On a tracker that is the right way to sell it, because the shaft is what turns a camera mount into something that can be balanced at all.

Two weights that do not agree

Eleven point three kilograms for the counterweight; 1.323 kg for the package. A box cannot weigh less than a tenth of its contents. Both figures come from the listing and both are printed above; this page does not choose between them.

The exclusion worth reading twice

Not compatible with the Star Adventurer GTi. Two mounts, one name, different arrangements — and the maker says so. That single line prevents the most likely wrong order.

What remains unpublished

The bore or thread of the weight, and the length of the shaft. Both would let the kit be checked against a mount before ordering.

Availability

German, French, Italian and Spanish Amazon stores ran from 55 € to 60 € 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 counterweights

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    Omegon 2.6 kg counterweight (59253)

    A steel counterweight of 2.6 kg with a 21 mm bore and a locking screw, made for the EQ-500 X and fitting many other shafts.

    Mass
    2.6 kg, as the maker publishes it
    Bore diameter
    21 mm, as the maker publishes it
    Locking method
    A locking screw for a secure seat
    Coating
    Steel
    Finish
    Not published by the maker.
    Compatible mounts
    EQ-500 X · The maker names Skywatcher, Meade and Celestron shafts
    Overall dimensions
    Not published by the maker.
    Amazon reference
    B07JCR2XYG (same reference on 6 Amazon marketplaces)
    EAN
    4049467592532
    • Both figures that matter — mass and bore — are published
    • The maker tells you to measure your own shaft before ordering
    • A 21 mm bore will not fit a 20 mm shaft securely, nor a 14.7 mm one at all

    Best for: Balancing a heavier tube or a camera on a 20–21 mm counterweight shaft

    ≈ £36 / €37
    Check price on Amazon
  • SVRITE 1 kg stainless steel counterweight

    SVRITE 1 kg stainless steel counterweight

    A 1 kg stainless steel counterweight with a 20.5 mm bore, sold for equatorial mounts, with no bullet points in the listing.

    Mass
    1 kg, from the title
    Bore diameter
    20.5 mm, from the title
    Locking method
    The listing gives none
    Coating
    Stainless steel, from the title
    Finish
    Not published by the maker.
    Compatible mounts
    Not published by the maker.
    Overall dimensions
    The listing gives none
    Amazon reference
    B0CQZKVBP7 (same reference on 6 Amazon marketplaces)
    EAN
    4713737267382
    • Both the mass and the bore appear in the title, which is what a counterweight needs
    • Stainless steel resists the corrosion that pits a painted cast weight
    • No description at all beyond the title

    Best for: A 20 mm counterweight shaft that needs a small additional mass

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  • Vixen 1.9 kg white counterweight

    Vixen 1.9 kg counterweight (2577-06)

    A 1.9 kg counterweight for seven named Vixen mounts, for balancing an increased payload.

    Mass
    1.9 kg, as the maker publishes it
    Bore diameter
    The listing gives none
    Locking method
    Not published by the maker.
    Coating
    Not published by the maker.
    Finish
    Not published by the maker.
    Compatible mounts
    SX, SX2, SXD, SXD2, SXP, GP2 and GPD2, all named
    Overall dimensions
    The listing gives none
    Amazon reference
    B002P4KLR6 (same reference on 5 Amazon marketplaces)
    EAN
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    • Seven compatible mounts named individually rather than by family
    • A 1.9 kg increment suits fine balancing on a medium mount
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    Best for: A Vixen SX or GP mount carrying more than it was balanced for

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The rest of this rack

  • ASToptics HazeAway 30 cm dew heater strip on a telescope tube

    ASToptics HazeAway USB heater strip 30 cm (49556)

    A 30 cm dew heater strip that wraps around the tube and runs from common 12 V power sources, for long observing and imaging sessions.

    Tube fit
    Not published by the maker.
    Outside diameter
    Not published by the maker.
    Shield length
    30 cm; the maker states other lengths exist for other apertures
    Construction
    Electrically heated dew strip — it warms the tube rather than shielding it
    Heater width
    Described as even
    Power draw
    Compatible with common 12 V sources, per the maker · The listing gives none
    Controller support
    Not published by the maker.
    Cable
    USB, from the product name
    Connector
    Not published by the maker.
    Amazon reference
    B0BPXKKMVC (same reference on 6 Amazon marketplaces)
    EAN
    4049467495567
    • A heater works where a shield fails: on a night when dew forms regardless
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    Best for: Imaging sessions where a shield alone does not keep the corrector clear

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    A dew cap for the Telrad projection finder, preventing the projection window fogging and covering it when the finder is not in use.

    Tube fit
    The Telrad projection finder, named by the maker
    Outside diameter
    Not published by the maker.
    Shield length
    Not published by the maker.
    Construction
    Dew cap for a projection finder · Impact-resistant plastic
    Heater width
    Not published by the maker.
    Power draw
    Not published by the maker.
    Controller support
    Not published by the maker.
    Cable
    Not published by the maker.
    Connector
    Not published by the maker.
    Amazon reference
    B07VG8B9CD (same reference on 5 Amazon marketplaces)
    EAN
    4007922063492
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    Best for: A Telrad owner whose finder fogs before the telescope does

    ≈ €29
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    A flexible plastic dew shield with a velvet inner finish for tubes of 225 to 245 mm outside diameter, closed with hook-and-loop.

    Tube fit
    225 to 245 mm, from the title
    Outside diameter
    Not published by the maker.
    Shield length
    Neither is published
    Construction
    Flexible wrap-around dew shield · Flexible plastic with a black textile velvet finish inside · Hook-and-loop
    Heater width
    Not published by the maker.
    Power draw
    Not published by the maker.
    Controller support
    Not published by the maker.
    Cable
    Not published by the maker.
    Connector
    Not published by the maker.
    Amazon reference
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    EAN
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All counterweights