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Extension Tubes

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  1. 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

  2. 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

  3. 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

  4. Optec - AP2.7 x 24tpi Extension Tube Set, 5-piece.

    Optec - AP2.7 x 24tpi Extension Tube Set, 5-piece.

    Includes ½”, ¾”, 1”, 1- ½”, and 3” extensions (#19891 through #19895)AP2 ... Learn More
    Model#: 19881
    $150.00

  5. 19800

    Optec - AP2.7 x 24tpi Extension Tube Set, 4-piece.

    Provides ¼” incremental extensions from ½” to 3-¼” Includes ½”, ¾”, 1”, and 1- ½” extensions (#19891 through #19894)AP2 ... Learn More
    Model#: 19880
    $115.00

  6. 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

  7. 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

  8. Meade - APO Focuser-Sleeve Extenson Tube

    Meade - APO Focuser-Sleeve Extenson 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

  9. 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

  10. 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

  11. 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

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

    Lumicon - 1.25in Thread-in Extension Tube with 1in 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
    $24.95

  13. Lumicon - 1.25in Dropin Extension Tube with 1in Eye Piece Push Back

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

    The Lumicon 1.25in Dropin Extension Tube with 1in Eye Piece Push Back drops into 1.25" eyepiece holders and accepts 1.25" eyepieces & accessories ... Learn More
    Model#: LA1015
    $24.95

  14. 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
    $35.95

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

    ...     Learn More
    Model#: ADPT2X2.1E
    $75.00

  20. HDFT-14

    Baader Planetarium - Spacer Tube 39mm for 3" RT Steeltrack, with 4" dovetail

    The 3" RT Spacer allows changing back-focus by providing quick connect/disconnect spacing of the 3" RT Steeltrack Focuser (39mm spacing length).4" External Dovetail on one side for attachment of 3" RT Steeltrack Focuser ... Learn More
    Model#: FOC-SPCR
    $69.00

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