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Extension Tubes

Items 41 to 55 of 55 total

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  1. 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#: MEA-07364
    $50.00

  2. 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

  3. 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

  4. 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.

    ...
    Learn More
    Model#: R20-1.0
    $65.00

  5. 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

  6. 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.

    ...
    Learn More
    Model#: R20-3.75
    $85.00

  7. Shelyak Instruments - Short EP holder

    Shelyak Instruments - Short EP holder

    Short eyepiece holder for Lhires III ... Learn More
    Model#: BA0018
    $65.47

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. Baader Planetarium - Spacer Tube 39mm for 3" RT Steeltrack, with 4" Dovetail

    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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