Extension Tubes

Showing 1 to 20 of 87 total
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  1. Lumicon - 2" Dropin Extension Tube with 1" Push Back

    $24.95
    SKU: LMC-LA1030

    Estimated shipping time is 3-5 Days

    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

    Out of stock

  2. Starlight Instruments - Riser, 2.0 " Diameter, adds 1.4 " to Height

    $75.00
    SKU: STA-R20-1.4

    Estimated shipping time is 3-5 Days

    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.

  3. Starlight Instruments - Riser, 2.0 " Diameter, adds 1.0 " to Height

    $75.00
    SKU: STA-R20-1.0

    Estimated shipping time is 3-5 Days

    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.

  4. Starlight Instruments - Riser, 2.0 " Diameter, adds 0.65 " to Height

    $70.00
    SKU: STA-R20-0.65

    Estimated shipping time is 3-5 Days

    Riser, 2.0" Diameter, adds 0.65" to HeightRisers attach to the base of a focuser to 'lift' the entire focuser
  5. Starlight Instruments - Riser, 2.0 " Diameter, adds 3.75 " to Height

    $95.00
    SKU: STA-R20-3.75

    Estimated shipping time is 3-5 Days

    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.

  6. Shelyak - Short EP holder

    $65.47
    SKU: SHE-BA0018

    Estimated shipping time is 3-5 Days

    Short eyepiece holder for Lhires III
  7. Optec - AP2.7 knurled female threaded retaining ring, 1/10" thick.

    $15.00
    SKU: OPT-19888

    Estimated shipping time is 3-5 Days

    AP2.7 Retaining RingOverall Height: 0.10" (2.5mm)Outside Diameter: 3.0" (88.9mm)Clear Aperture: 2.69" (68 mm)Weight: 0
  8. Optec - AP2.7 x 24tpi Extension Tube, 3" length.

    $40.00
    SKU: OPT-19886

    Estimated shipping time is 3-5 Days

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

    $30.00
    SKU: OPT-19885

    Estimated shipping time is 3-5 Days

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

    $30.00
    SKU: OPT-19884

    Estimated shipping time is 3-5 Days

    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
  11. Optec - AP2.7 x 24tpi Extension Tube, 3/4" length.

    $30.00
    SKU: OPT-19883

    Estimated shipping time is 3-5 Days

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

    $30.00
    SKU: OPT-19882

    Estimated shipping time is 3-5 Days

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

    $150.00
    SKU: OPT-19881

    Estimated shipping time is 3-5 Days

    Includes ½”, ¾”, 1”, 1- ½”, and 3” extensions (#19891 through #19895)AP2
  14. Optec - AP2.7 x 24tpi Extension Tube Set, 4-piece.

    $115.00
    SKU: OPT-19880

    Estimated shipping time is 3-5 Days

    Provides ¼” incremental extensions from ½” to 3-¼” Includes ½”, ¾”, 1”, and 1- ½” extensions (#19891 through #19894)AP2
  15. Optec - 2-" to 3"x 24 tpi male threaded mount.

    $95.00
    SKU: OPT-17666

    Estimated shipping time is 3-5 Days

    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
  16. Starlight Instruments - Riser, 2.0 " Diamter, adds 2.75 " to Height

    $90.00
    SKU: STA-R20-2.75

    Estimated shipping time is 3-5 Days

    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.

  17. Vixen - Extension Tube R200SS

    Regular Price: $15.95

    You Pay: $13.56

    SKU: VIX-2961

    In stock

    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.

  18. iOptron - iEQ45 Extension Bar

    $68.00
    SKU: IOP-8026

    More on the way - Although this item is temporarily on Back order, you can order it now and it will ship as soon as it arrives. Your card will only be charged once item is shipped.

    This is the extension bar for the iEQ45. This attaches to the original bar and will create more counterbalance weight. The original counterweight also attaches to this extension bar.

  19. Astrodon - 1.25'' Eyepiece Extender

    $28.00
    SKU: ADO-MOAG-EYE

    This Item Will Be Available in 2-3 Months

    This eyepiece extension is designed to work with all Astrodon Manual Off-Axis Guiders, or MOAG's.

  20. Stellarvue - 42mm Variable Extension Tube - 8 - 12mm Length

    $29.00
    SKU: STV-SFE-M42-V

    More on the way - Although this item is temporarily on Back order, you can order it now and it will ship as soon as it arrives. Your card will only be charged once item is shipped.

    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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