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Extension Tubes

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  1. 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

  2. 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

  3. Optec - AP2.7 knurled female threaded retaining ring, 1/10" thick.

    Optec - AP2.7 knurled female threaded retaining ring, 1/10" thick.

    AP2.7 Retaining RingOverall Height: 0.10" (2.5mm)Outside Diameter: 3.0" (88.9mm)Clear Aperture: 2.69" (68 mm)Weight: 0 ... Learn More
    Model#: 19888
    $15.00

  4. 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

  5. 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

  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#: 05125
    $25.99

  7. 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

  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 - 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

  10. Optec - AP2.7 x 24tpi Extension Tube, 1" length.

    Optec - AP2.7 x 24tpi Extension Tube, 1" length.

    AP2.7 Extension - 1" LengthOverall Height: 1.38" (35.0mm)Clear Aperture: 2.52" (64mm)Weight: 1.8 oz (55 g)Back-focus Usage: 1.00" (25 ... Learn More
    Model#: 19884
    $30.00

  11. Optec - AP2.7 x 24tpi Extension Tube, 1/2" length.

    Optec - AP2.7 x 24tpi Extension Tube, 1/2" length.

    AP2.7 Extension - 1/2" LengthOverall Height: 0.88"  (22.4mm)Clear Aperture: 2.52" (64mm)Weight: 1.0 oz (30 g)Back-focus Usage: 0.50" (12 ... Learn More
    Model#: 19882
    $30.00

  12. Optec - AP2.7 x 24tpi Extension Tube, 1-1/2" length.

    Optec - AP2.7 x 24tpi Extension Tube, 1-1/2" length.

    AP2.7 Extension - 1-1/2" LengthOverall Height: 1.87"  (47.5mm)Clear Aperture: 2.52" (64mm)Weight: 2.4 oz (70 g)Back-focus Usage: 1.50" (38 ... Learn More
    Model#: 19885
    $30.00

  13. 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

  14. 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

    Regular Price: $32.00

    Special Price: $31.00

  15. 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

  16. 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

  17. 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

  18. 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

  19. TeleVue - Eyeguard Extender - Twist-on Style
  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
    $45.00

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