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Extension Tubes

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  1. 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

    In Stock

    $15.95

  2. 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

    In Stock

    $15.95

  3. TeleVue - Eyeguard Extender - Twist-on Style*

    TeleVue - Eyeguard Extender - Twist-on Style*

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    Model#: EGE-0020

    Available - Ships in 2-4 Days

    Regular Price: $35.00

    Special Price: $33.95

  4. TeleVue - 3.5" Long Extension*

    TeleVue - 3.5" Long Extension*

    Includes brass clamp ring

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    Model#: X3C-0009

    In Stock

    Regular Price: $65.00

    Special Price: $58.95

  5. 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

    In Stock

    Regular Price: $65.00

    Special Price: $58.95

  6. 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

    In Stock

    Regular Price: $30.00

    Special Price: $28.95

  7. 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

  8. 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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    Model#: TSQ0106QE

    Available - Ships in 2-4 Days

    $570.00

  9. 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

  10. 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

    Available - Typically ships in 1-3 Days

    $29.00

  11. 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

    Available - Typically ships in 1-3 Days

    $19.00

  12. 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

    Available - Typically ships in 1-3 Days

    $19.00

  13. 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

    Available - Typically ships in 1-3 Days

    $19.00

  14. 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

    Available - Typically ships in 1-3 Days

    $19.00

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

  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

    Available - Ships in 2-4 Days

    $85.00

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