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Extension Tubes

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  1. 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

  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
    $149.99

  5. 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
    $65.00

  6. 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
    $60.00

  7. Lumicon - 2in Dropin Extension Tube with 1in Push Back

    Lumicon - 2in Dropin Extension Tube with 1in Push Back

    The Lumicon 2in Dropin Extension Tube with 1in Eyepiece Push Back drops into 2" eyepiece holders and accepts 2" eyepieces & accessories. Moves the eyepiece a minimum of 1" back. Includes 2"/48mm filter threads ... Learn More
    Model#: LA1030
    $29.95

  8. Lumicon - 2in Thread-in Extension Tube with 2in Push-Back

    Lumicon - 2in Thread-in Extension Tube with 2in Push-Back

    The Lumicon 2in Threadin Extension Tube with 2in Eye Piece Push-Back threads into 2" eyepieces. Provides an extension range of the eyepiece from 0 to 2". Includes 2"/48mm filter threads ... Learn More
    Model#: LA1025
    $29.95

  9. Lumicon - 1.25 Drop-in Extension Tube 3 Push Back.

    Lumicon - 1.25 Drop-in Extension Tube 3 Push Back.

    The Lumicon 1.25" Drop-in Extension Tube, 3" Push Back, drops into 1.25" eyepiece holders and accepts 1.25" eyepieces & accessories. Provides an extension range of 1" to 3.25" ... Learn More
    Model#: LA1020

    Regular Price: $43.00

    Special Price: $35.95

  10. Lumicon - 1.25" Dropin Extension Tube with 1" Eye Piece Push Back

    Lumicon - 1.25" Dropin Extension Tube with 1" Eye Piece Push Back

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    Model#: LA1015

    Regular Price: $29.00

    Special Price: $24.95

  11. Lumicon - 1.25" Thread-in Extension Tube with 1" Eyepiece Push-back

    Lumicon - 1.25" Thread-in Extension Tube with 1" Eyepiece Push-back

    The Lumicon 1.25in Threadin Extension Tube with 1in Eye Piece Push Back threads into 1.25" eyepieces and is for small focus extension. Provides extra reach of 0 to 1" ... Learn More
    Model#: LA1010

    Regular Price: $29.00

    Special Price: $24.95

  12. JMI - 2 " Enhanced Extension Tube (2.63 ")

    JMI - 2 " Enhanced Extension Tube (2.63 ")

    Enhanced extension tubes include a compression ring and 48mm filter threads. See the Adapter Comparison Chart.2" diameter x 2 ... Learn More
    Model#: ADPT2X2.6E
    $79.00

  13. JMI - 2 " Enhanced Extension Tube (2.13 ")

    JMI - 2 " Enhanced Extension Tube (2.13 ")

    Enhanced extension tubes include a compression ring and 48mm filter threads. 2" diameter x 2.13" height

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    Model#: ADPT2X2.1E
    $75.00

  14. JMI - Extension Tube 2 " dia. x 2.5 " ht

    JMI - Extension Tube 2 " dia. x 2.5 " ht

    Extends the range of low-profile focusers. 2″ diameter x 2 ... Learn More
    Model#: ADPT2EXTL
    $59.00

  15. JMI - Extension Tube 2 " dia. x 1.5 " ht

    JMI - Extension Tube 2 " dia. x 1.5 " ht

    Extends the range of low-profile focusers. 2″ diameter x 1 ... Learn More
    Model#: ADPT2EXT
    $49.00

  16. JMI - Extension Tube 1.25 " dia. x 1.6 " ht

    JMI - Extension Tube 1.25 " dia. x 1.6 " ht

    Extends the range of low-profile focusers. 1.25″ diameter x 1 ... Learn More
    Model#: ADPT1EXT
    $45.00

  17. Lumicon - 2 " Extension Tube 1.5 Push-Back Drop-in

    Lumicon - 2 " Extension Tube 1.5 Push-Back Drop-in

    The Lumicon 2 inch Drop-in Extension Tube, 1.6" Push-Back, drops into 2" eyepiece holders, and accepts 2" eyepieces & accessories. Provides a minimum extension of 1.6". Includes 2"/48mm filter threads ... Learn More
    Model#: LA1035
    $29.95

  18. Meade - APO Focuser-Sleeve Extension Tube

    Meade - APO Focuser-Sleeve Extension Tube

    Meade APO Focuser-Sleeve Extension Tube (50mm) 07364 can allow telescope with focus travel limitations to be used in terrestial observing ... Learn More
    Model#: 07364
    $50.00

  19. Optec - 2-" to 3"x 24 tpi male threaded mount.

    Optec - 2-" to 3"x 24 tpi male threaded mount.

    The 2-inch to 3-inch thread adapter was developed to easily adapt the Apogee and SBIG cameras and filters wheels for the TCF-S focuser.By holding tight tolerances (+/- 0.003") Optec has achieved a slip-fit that is second-to-none ... Learn More
    Model#: 17666
    $95.00

  20. 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
    $85.00

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