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Extension Tubes

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  1. Astrodon 1.25" Eyepiece Extender

    Astrodon - 1.25" Eyepiece Extender

    This eyepiece extension is designed to work with all Astrodon Manual Off-Axis Guiders, or MOAG's.

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    Model#: MOAG-EYE
    $28.00

  2. 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
    $30.00

  3. 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

  4. Explore Scientific - 5x Focal Extender 1.25" Barrel - 4 Elements

    Explore Scientific - 5x Focal Extender 1.25" Barrel - 4 Elements

    Provides excellent control of chromatic and spherical aberration, and a flatter field-of-view compared to standard barlows.

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    Model#: FE05-125
    Explore Scientific Fireworks All Month Long Sale (ends July 31, 2016)!

    Regular Price: $149.99

    Special Price: $119.99

  5. Explore Scientific - 2x Focal Extender 1.25" Barrel - 4 Elements

    Explore Scientific - 2x Focal Extender 1.25" Barrel - 4 Elements

    Provides excellent control of chromatic and spherical aberration, and a flatter field-of-view compared to standard barlows.

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    Model#: FE02-125
    $99.99

  6. Orion 1.25" Standard Tele-Extender

    Orion - 1.25" Standard Tele-Extender

    Orion tele-extenders permit high-magnification "eyepiece projection" photography of the Moon and planets with a Schmidt-Cassegrain telescope. Orion tele-extenders are designed to fit all Celestron and Meade Schmidt-Cassegrain telescopes.

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    Model#: ORI-05125
    $29.99

  7. iOptron - iEQ45 Extension Bar

    iOptron - iEQ45 Extension Bar

    This is the extension bar for the iEQ45. This attaches to the original bar and will create more counterbalance weight. ... Learn More
    Model#: 8026
    $48.00

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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
    $18.99

  14. 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
    $21.99

  15. 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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    (48 States)
    Model#: TSQ0106QE
    $599.00

  16. Stellarvue 42mm Variable Extension Tube - 8 - 12mm Length

    Stellarvue - 42mm Variable Extension Tube - 8 - 12mm Length

    This is an adjustable 42 mm extension tube that adds 8-12 mm of length. Thread is the standard 1.8" filter thread size of M42 X .75.

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    Model#: SFE-M42-V
    $29.00

  17. Stellarvue 42mm Extension Tube - 30mm Length

    Stellarvue - 42mm Extension Tube - 30mm Length

    This is a 42 mm extension tube that adds 30 mm of length. The outside diameter is 1.8". The male thread is just over 3 mm long and the female thread is about 27.6 mm deep.

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    Model#: SFE-M42-030
    $19.00

  18. Stellarvue 42mm Extension Tube - 20mm Length

    Stellarvue - 42mm Extension Tube - 20mm Length

    This is a 42 mm extension tube that adds 20 mm of length. The outside diameter is 1.8". The male thread is just under 3 mm long and the female thread is about 18.5 mm deep.

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    Model#: SFE-M42-020
    $19.00

  19. Stellarvue 42mm Extension Tube - 10mm Length

    Stellarvue - 42mm Extension Tube - 10mm Length

    This is a 42 mm extension tube that adds 10 mm of length. The outside diameter is 1.8". The male thread is just under 3 mm long and the female thread is about 8.4 mm deep.

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    Model#: SFE-M42-010
    $19.00

  20. Stellarvue - 42mm Extension Tube - 5mm Long

    Stellarvue - 42mm Extension Tube - 5mm Long

    This is a 42 mm extension tube that adds 5 mm of length. The outside diameter is 1.8". The male thread is just under 3 mm long and the female thread is about 4.5 mm deep.

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    Model#: SFE-M42-005
    $19.00

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