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Extension Tubes

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  1. Vixen - Tele-Extender R200SS

    Vixen - Tele-Extender R200SS

    Designed to increase the focal length of the R200SS to 1500mm (f /7.5), this Tele-Extender is designed for astrophotographic use only

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    Model#: 3839
    $129.00

  2. 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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    (48 States)
    Model#: 3909
    $249.00

  3. 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
    10% off while supplies last!

    Regular Price: $15.95

    Special Price: $14.36

  4. 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
    10% off while supplies last!

    Regular Price: $15.95

    Special Price: $14.36

  5. Vixen - C Mount Extender 24X 125

    Vixen - C Mount Extender 24X 125

    This 18mm eyepiece is often an excellent medium magnification eyepiece while still preserving a very comfortable 20mm of eye-relief. With 50 degrees of Apparent Field of View the Moon, Galaxies, Globular Clusters and Nebulae are great targets often with this eyepiece.

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    Model#: 3748
    $59.95

  6. 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
    10% off while supplies last!

    Regular Price: $39.95

    Special Price: $35.96

  7. TeleVue - Eyeguard Extender - Twist-on Style
  8. TeleVue - 3.5" Long Extension

    TeleVue - 3.5" Long Extension

    Includes brass clamp ring

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    Model#: X3C-0009
    $75.00

  9. 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
    $75.00

  10. 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
    $40.00

  11. 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

  12. 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

  13. Starlight Instruments - Riser, 2.0 " Diameter, adds 3.75 " to Height

    Starlight Instruments - Riser, 2.0 " Diameter, adds 3.75 " 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#: R20-3.75
    $69.00

  14. 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

  15. 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

  16. 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

  17. Shelyak Instruments - Short EP holder

    Shelyak Instruments - Short EP holder

    Short eyepiece holder for Lhires III ... Learn More
    Model#: BA0018
    $65.47

  18. 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#: 05125
    $25.99

  19. Optec - AP2.7 x 24tpi Extension Tube, 3/4" length.

    Optec - AP2.7 x 24tpi Extension Tube, 3/4" length.

    AP2.7 Extension - 3/4" LengthOverall Height: 1.13" (28.7mm)Clear Aperture: 2.52" (64mm)Weight: 1.4 oz (40 g)Back-focus Usage: 0.75" (19 ... Learn More
    Model#: 19883
    $30.00

  20. Optec - AP2.7 x 24tpi Extension Tube, 3" length.

    Optec - AP2.7 x 24tpi Extension Tube, 3" length.

    AP2.7 Extension - 3" LengthOverall Height: 3.38" (85.8mm)Clear Aperture: 2.52" (64mm)Weight: 8.2 oz (230 g)Back-focus Usage: 3.00" (76 ... Learn More
    Model#: 19886
    $40.00

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