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Red dot finders

Tydeux Red dot finder (OTH22)

Tydeux's red dot finder: a red LED dot on a non-magnifying window, thumbwheels for both axes, adjustable brightness, a bracket for common dovetail bases and a CR2032 cell in the box.

Tydeux red dot finder with a dovetail bracket and two thumbwheels

Tydeux Red dot finder (OTH22)

Tydeux's red dot finder: a red LED dot on a non-magnifying window, thumbwheels for both axes, adjustable brightness, a bracket for common dovetail bases and a CR2032 cell in the box.

Reticle type
Small red LED dot on a non-magnifying viewing window
Brightness adjustment
Adjustable, stated
Bracket fitting
Bracket for the dovetail mounting base on many telescopes
Battery type
CR2032 lithium button cell, included
Life
Not published by the maker.
Window size
Not published by the maker.
Alignment adjustment
Thumbwheels for horizontal and vertical positioning
Amazon reference
B0BTH8K6TY
EAN
6973787051685
  • Battery included
  • Thumbwheel alignment on both axes
  • Listing text shared almost word for word with other brands' finders

Best for: The cheapest way to put an aiming reference on a telescope that has a dovetail shoe

≈ $17
Check price on Amazon

Specifications

Reticle type
Small red LED dot on a non-magnifying viewing window
Brightness adjustment
Adjustable, stated
Bracket fitting
Bracket for the dovetail mounting base on many telescopes
Battery type
CR2032 lithium button cell, included
Life
Not published by the maker.
Window size
Not published by the maker.
Alignment adjustment
Thumbwheels for horizontal and vertical positioning
Amazon reference
B0BTH8K6TY
EAN
6973787051685

A basic red dot

A red LED dot on a non-magnifying window, adjustable brightness, thumbwheels for horizontal and vertical alignment, and a bracket for the dovetail base on many telescopes. A CR2032 cell is in the box.

Shared words

The five bullets match, nearly word for word, those of other budget red dot finders, including Astromania’s. The difference that matters here is the battery: included.

Fitting

Tydeux names no telescope series. Check that your telescope has a standard dovetail finder shoe.

Price and availability

On November 7, 2026, Amazon.com listed it at about $17 from a third-party seller.

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 November 7, 2026. The live price is at the top of the page.

What gets asked before buying

Will it fit my telescope?

If the telescope has a standard dovetail finder shoe. Tydeux does not name series; check the shoe.

Is it different from Astromania's?

The description is nearly identical to [Astromania's](/accessories/red-dot-finders-astromania-bracket/); Tydeux includes the battery, Astromania names a Synta-style foot.

How do I align it?

Center a distant object in a low-power eyepiece by day, then turn the thumbwheels until the dot covers it.

What barrel it suits

More red dot finders

  • Astromania StarPointer Deluxe red dot finder with a large viewing window and a dovetail foot

    Astromania StarPointer Deluxe (RSEZ2)

    Astromania's StarPointer Deluxe: a large-window reflex finder with four reticle patterns, five brightness levels in red or green, 1 MOA hex-key adjustment, a Vixen and Sky-Watcher bracket and a Picatinny rail underneath.

    Reticle type
    Four reticle patterns, red or green LED, on a large non-magnifying window
    Brightness adjustment
    Five levels in red or green · off position between R and G
    Bracket fitting
    Dovetail bracket for Vixen and Sky-Watcher shoes · removable to reveal a Picatinny rail
    Battery type
    CR2032 lithium button cell, included
    Life
    Not published by the maker.
    Window size
    Large viewing window, stated · no figure
    Alignment adjustment
    Horizontal and vertical set screws with the attached hex wrench · about 1 MOA per click, stated
    Amazon reference
    B0140UA2OY
    EAN
    6970019291123
    • Four reticles in red or green, five brightness levels
    • 1 MOA adjustment published; set screws hold alignment
    • Set screws need a hex key to adjust

    Best for: A telescope that needs a finder that holds its alignment, for someone who wants a choice of reticle

    ≈ $40
    Check price on Amazon
  • Astromania red dot finder with a slide-in bracket and two thumbwheels

    Astromania Red dot finder with bracket (TRSTC)

    Astromania's StarPointer-style red dot finder: a red LED dot on a non-magnifying window, thumbwheels for both axes, adjustable brightness and a foot made to fit Synta-style slots, battery not included.

    Reticle type
    Small red LED dot on a non-magnifying viewing window
    Brightness adjustment
    Adjustable, stated
    Bracket fitting
    Foot designed for Synta-style slots
    Battery type
    CR2032 lithium button cell, not included
    Life
    Not published by the maker.
    Window size
    Not published by the maker.
    Alignment adjustment
    Thumbwheels for horizontal and vertical positioning
    Amazon reference
    B07CGH99X5
    EAN
    6971336223255
    • Synta-style foot fits most Sky-Watcher and similar shoes
    • Thumbwheel alignment on both axes
    • Battery not included

    Best for: Replacing a broken red dot finder on a telescope with a Synta-pattern shoe

    ≈ $19
    Check price on Amazon
  • Celestron StarPointer red dot finderscope on its mounting base

    Celestron StarPointer (51630)

    Celestron's StarPointer: a 1x red dot finder that keeps the sky right side up and correct left to right, with adjustable brightness, a mounting base and a CR2032 battery included.

    Reticle type
    Red dot, 1x, right-side-up and left-to-right correct
    Brightness adjustment
    Knob adjusts the dot's brightness
    Bracket fitting
    Mounting base included · small footprint, stated to fit almost any telescope, binocular or spotting scope
    Battery type
    CR2032 3 V, included
    Life
    Not published · "long-lasting" battery stated
    Window size
    Not published by the maker.
    Alignment adjustment
    Not described in the bullets
    Amazon reference
    B00009X3UU
    EAN
    0050234516303
    • Base and battery in the box
    • Right-side-up 1x view matches the naked eye
    • Alignment controls not described

    Best for: A Celestron telescope that lost its finder, where the base and battery need replacing too

    ≈ $24
    Check price on Amazon

The rest of this rack

  • K&F Concept Nano-X 67 mm natural night filter

    K&F CONCEPT Nano-X Natural Night 67 mm

    K&F Concept's Nano-X Natural Night filter: a 67 mm camera-lens filter that blocks sodium streetlight wavelengths of about 580 to 610 nm, in Japanese optical glass with a 28-layer coating on both faces.

    Blocked wavelengths and published curve
    About 580 to 610 nm blocked, stated · no curve published
    LED and sodium behavior
    Targets the yellow, beige and orange light of common artificial sources (sodium) · LED behavior not stated
    Visual or photographic design
    Photographic: a 67 mm camera-lens filter for night landscape and astrophotography
    Coating and glass
    Japanese optical glass · 28-layer nano coating on both faces · scratch, water, oil and dust resistant
    Thread size
    67 mm (2.64 in) camera-lens thread
    Weight
    68 g (2.4 oz)
    Focal ratio limits
    Not published by the maker.
    Maker reference
    FT011117 (Nano-X series)
    Amazon reference
    B07PG785HC
    EAN
    6936069223248
    • Blocked band published: about 580 to 610 nm
    • 28-layer coating on both faces
    • Camera-lens filter: does not fit a telescope eyepiece

    Best for: Wide-field tracked photography with a 67 mm camera lens under sodium-lit skies

    Check price on Amazon
  • SVBONY 1.25 inch CLS light pollution filter

    SVBONY CLS 1.25 in (FUSF9155A)

    SVBONY's 1.25-inch CLS broadband filter: 90% transmission at the H-beta, OIII, H-alpha and SII nebula lines and 0.1% at the sodium and mercury lines of artificial lighting, with ion-assisted coatings.

    Blocked wavelengths and published curve
    Off-band 0.1% at sodium 589 nm and mercury 435 and 578 nm · pass-band 90% at H-beta 486, OIII 496 and 500, H-alpha 656, SII 672 nm
    LED and sodium behavior
    Sodium and mercury lines blocked, stated · LED behavior not stated
    Visual or photographic design
    Broadband, stated suitable for color CCD cameras and unmodified DSLRs
    Color cast
    Not published by the maker.
    Thread size
    1.25 in
    Focal ratio limits
    Not published · central wavelength stated stable with temperature
    Amazon reference
    B079BWD595
    EAN
    0609378745577
    • Pass-band and off-band transmissions published at named lines
    • Ion-assisted deposition coating, stated durable
    • Little effect on white LED light pollution

    Best for: Imaging or observing emission nebulae from a town, with a color camera or by eye

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  • Almencla 0.965 inch telescope filter with a metal rim

    Almencla 0.965 in Moon filter

    A 0.965-inch filter for older telescopes, in an aluminum alloy rim, whose listing describes it as a Moon filter, a nebula filter and a set of four, with no transmission figure.

    Transmission percentage
    Not published by the maker.
    Neutral or tinted dimming
    Not published by the maker.
    Fixed or variable design
    Fixed · described both as a Moon filter and as a nebula filter
    Thread size
    0.965 in (24.5 mm)
    Glass flatness
    Not published · glass lens in a metal rim
    Cell depth
    Not published · 6 g
    Amazon reference
    B07VQKLGZ8
    EAN
    0614089427032
    • Fits 0.965 in eyepieces, which few filters do
    • Metal rim
    • Described as both a Moon filter and a nebula filter

    Best for: An older telescope with 0.965 in eyepieces, where almost nothing else fits

    ≈ $20
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All red dot finders