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Extension Tubes

Items 21 to 40 of 55 total

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  1. Stellarvue 2" Extension Tube - Extends 4.75"

    Stellarvue - 2" Extension Tube - Extends 4.75"

    Provides an additional 4,75” of  back focus. The 2” receptacle is 1.6” deep so if the item you are inserting is longer than 1.6”, add the difference to 4.75” to determine the actual amount of extension.

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    Model#: ET475

    Available - Typically ships in 1-3 Days

    $49.00

  2. Stellarvue 2" Extension Tube - Extends 2.26"

    Stellarvue - 2" Extension Tube - Extends 2.26"

    Provides an additional 2.26” of  back focus. The 2” receptacle is 1.6” deep so if the item you are inserting is longer than 1.6”, add the difference to 2.26” to determine the actual amount of extension.

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    Model#: ET003

    Available - Typically ships in 1-3 Days

    $49.00

  3. Stellarvue - 2" Extension Tube - Extends 1 3/8"

    Stellarvue - 2" Extension Tube - Extends 1 3/8"

    Provides 1 3/8" of additional focus travel to  the rear. This is a 2" diameter extension tube with compression ring and safety groove.

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    Model#: ET001

    Available - Typically ships in 1-3 Days

    $29.00

  4. Starlight Xpress - AO- OAG Autoguider Extension Tube

    Starlight Xpress - AO- OAG Autoguider Extension Tube

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    Model#: SX-AO/OAG-EXT

    Available - Ships in 2-4 Days

    $45.00

  5. Astro-Physics 8" Extension for 6" Eagle Pier

    Astro-Physics - 8" Extension for 6" Eagle Pier

    Please Note: We cannot ship Astro-Physics products to customers in Germany, Switzerland, Austria, France and Japan.

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    Model#: EAGLE6E8

    Available - Typically ships in 1-3 Days

    $350.00

  6. Takahashi f/8 Visual Extension Tube

    Takahashi - f/8 Visual Extension Tube

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    Model#: TSP0060

    Available - Ships in 2-4 Days

    $52.00

  7. 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

    In Stock

    $163.00

  8. 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

    Available - Ships in 2-4 Days

    $75.00

  9. 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

    Available - Ships in 2-4 Days

    $65.00

  10. 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

    Available - Ships in 2-4 Days

    $39.95

  11. 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

    In Stock

    $39.95

  12. 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

    Available - Ships in 2-4 Days

    $39.95

  13. 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

    Available - Ships in 2-4 Days

    $33.95

  14. 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

    Available - Ships in 2-4 Days

    $33.95

  15. 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

    Available - Ships in 2-4 Days

    $33.95

  16. 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

    Available - Ships in 2-4 Days

    $89.00

  17. 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

    Available - Ships in 2-4 Days

    $85.00

  18. 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

    Available - Ships in 2-4 Days

    $69.00

  19. 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

    Available - Ships in 2-4 Days

    $59.00

  20. 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

    Available - Ships in 2-4 Days

    $55.00

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