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Extension Tubes

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  1. Avalon Instruments Mini Modular Extender for M-Uno Declination L55 mm

    Avalon Instruments - Mini Modular Extender for M-Uno Declination L55 mm

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    FREE SHIPPING
    (48 States)
    Model#: AVMINIEXT055
    $215.00

  2. Vixen - 2.6" Extension Tube for 60mm Drawtubes

    Vixen - 2.6" Extension Tube for 60mm Drawtubes

    Allows astrophotography for many telescopes needing more back-focus by moving the film plane back up to a maximum of 2.6".

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    Model#: 2956
    $39.95

  3. TeleVue - 3.5" Long Extension

    TeleVue - 3.5" Long Extension

    Includes brass clamp ring

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    Model#: X3C-0009
    5% off

    Regular Price: $75.00

    Special Price: $71.25

  4. TeleVue 2" Long Extension

    TeleVue - 2" Long Extension

    The TeleVue Extension Tube - X2C-0008 provides an additional 2" of focuser travel length which can sometimes be necessary when doing photography through many scopes - particularly when the 2" diagonal is removed.

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    Model#: X2C-0008
    5% off

    Regular Price: $75.00

    Special Price: $71.25

  5. TeleVue - 2" Eyepiece Barrel Extender

    TeleVue - 2" Eyepiece Barrel Extender

    Reduces focuser travel with 55 Plossl. Includes filter threads

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    Model#: EBX-2120

    Regular Price: $40.00

    Special Price: $38.00

  6. Takahashi - 2" Extension Tube

    Takahashi - 2" Extension Tube

    This 2" extension tube by Takahashi is compatible with the TOA-130.

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    Model#: TET0002L
    $82.00

  7. Starlight Instruments - Riser, 2.0 " Diamter, adds 2.75 " to Height

    Starlight Instruments - Riser, 2.0 " Diamter, adds 2.75 " to Height

    Risers attach to the base of a focuser to 'lift' the entire focuser. Unless otherwise noted, the end of the riser which attaches to the OTA will be the same thread and diameter as the original focuser body.

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    Model#: R20-2.75
    $59.00

  8. Starlight Instruments - Riser, 2.0 " Diameter, adds 1.4 " to Height

    Starlight Instruments - Riser, 2.0 " Diameter, adds 1.4 " to Height

    Risers attach to the base of a focuser to 'lift' the entire focuser. Unless otherwise noted, the end of the riser which attaches to the OTA will be the same thread and diameter as the original focuser body.

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    Model#: R20-1.4
    $49.00

  9. Starlight Instruments - Riser, 2.0 " Diameter, adds 1.0 " to Height

    Starlight Instruments - Riser, 2.0 " Diameter, adds 1.0 " to Height

    Risers attach to the base of a focuser to 'lift' the entire focuser. Unless otherwise noted, the end of the riser which attaches to the OTA will be the same thread and diameter as the original focuser body.

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    Model#: R20-1.0
    $49.00

  10. Starlight Instruments - Riser, 2.0 " Diameter, adds 0.65 " to Height

    Starlight Instruments - Riser, 2.0 " Diameter, adds 0.65 " to Height

    Riser, 2.0" Diameter, adds 0.65" to HeightRisers attach to the base of a focuser to 'lift' the entire focuser ... Learn More
    Model#: R20-0.65
    $45.00

  11. Vixen - Extension Tube 43mm

    Vixen - Extension Tube 43mm

    Enhances the ability to perform astrophotography for many telescopes needing more back-focus, by moving the film plane back up to a maximum of 40mm.

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    Model#: 2957
    $15.95

  12. Vixen - Extension Tube R200SS

    Vixen - Extension Tube R200SS

    Adds 20mm of length to the R200SS Optical tube and allows attachment of a 42mm T thread to 43mm accessory. This is customarily used with optional item number 3523 for eyepiece projection photography

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    Model#: 2961
    $15.95

  13. Vixen - Half Pillar GP Mount

    Vixen - Half Pillar GP Mount

    This Half Pillar provides a 9" extension between the counterweight shaft or longer tube refractor and the tripod legs

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    FREE SHIPPING
    (48 States)
    Model#: 3909
    $249.00

  14. Avalon Instruments Extender for Avalon Tripod - 8" Height

    Avalon Instruments - Extender for Avalon Tripod - 8" Height

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    FREE SHIPPING
    (48 States)
    Model#: AVEXT
    $320.00

  15. Takahashi f/8 Visual Extension Tube

    Takahashi - f/8 Visual Extension Tube

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    Model#: TSP0060
    $52.00

  16. Takahashi Extender-QE 1.6x 2" Field Flattener

    Takahashi - Extender-QE 1.6x 2" Field Flattener

    Created specifically for use with the new Takahashi FSQ-106ED “New Q" refractor , the Takahashi Extender - TSQ0106QE acts as both a 1.6X magnification visual barlow and a photographic tele-extender that flattens the field.

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    FREE SHIPPING
    (48 States)
    Model#: TSQ0106QE
    $599.00

  17. Explore Scientific - Rack and Pinion Focuser 2" Extension Tube

    Explore Scientific - Rack and Pinion Focuser 2" Extension Tube

    2" Extension tube for Explore Scientific Rack and Pinion focusers.

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    Model#: ESRPEXT2

    Regular Price: $27.99

    Special Price: $11.99

  18. Explore Scientific - Rack and Pinion Focuser 1" Extension Tube

    Explore Scientific - Rack and Pinion Focuser 1" Extension Tube

    1" Extension tube for Explore Scientific Rack and Pinion focusers.

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    Model#: ESRPEXT1

    Regular Price: $27.99

    Special Price: $11.99

  19. T2-29

    Baader Planetarium - T-2/M48 Expanding Ring

    Baader T-2 Female to M48 Male Expanding Ring # T2-29 2458110

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    Model#: T2-29

    Regular Price: $32.00

    Special Price: $31.00

  20. TeleVue - Eyeguard Extender - Twist-on Style

    TeleVue - Eyeguard Extender - Twist-on Style

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    Model#: EGE-0020
    5% off

    Regular Price: $45.00

    Special Price: $42.75

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