Optical Tube Assemblies

Just the telescope tube without the mount. Build your own custom setup or upgrade your existing one.

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  1. Celestron C5 Spotting Scope
    AUD $1,459.00

    Backorder Available

    Out of stock

    • 5" Schmidt-Cassegrain Optical Design
    • StarBright XLT Coatings
    • 25 mm (50x) Eyepiece
    • 45° Erect Image Diagonal
    • 6x30 Erect Image Finderscope
    • Water-Resistant Soft-Sided Case
    • Limited Lifetime Warranty

    NOTE:  For solar observing we recommend the Astrozap Glass Solar Filter (Product No. 124466) for use on this telescope.

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  2. saxon 100 ED Refractor Telescope
    AUD $1,499.00

    Backorder Available

    Out of stock

    Make the saxon 100 ED Refractor Telescope part of your astronomy journey with its quality optics and portability.

    With an aperture of 100mm and a focal length of 900mm, this telecope is perfect for wide field photography of both land and sky objects. Weighing just under 4 kg, this OTA can easily be transported around and mounted on your choice of mount and tripod. 

    For a high-performing telescope at an affordable price tag, your choice has to be the saxon 100 ED Refractor Telescope

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  3. Celestron C8 SCT OTA - CGE
    AUD $2,069.00

    Backorder Available

    Out of stock

    • 8" Schmidt-Cassegrain optical tube assembly (OTA)
    • Features Celestron's premium patented StarBright XLT optical coatings
    • 2032 mm focal length (f/10)
    • Fastar compatible
    • Tube constructed of durable and lightweight aluminum
    • Includes: 25mm eyepiece (81x), 6x30 optical finderscope, star diagonal, 1.25” visual back, CGEM style dovetail bar

    NOTE: The recommended solar filter for this scope for solar observing is the Astrozap Glass Solar Filter (Product No. 124451) 

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  4. saxon 80mm Apochromatic FCD100 Air-Spaced ED Triplet Refractor Telescope
    AUD $2,299.00

    Backorder Available

    Out of stock

    • Air-spaced triplet optical design
    • Japanese made Hoya FCD100 optics
    • Advanced chromatic aberration correction
    • ED glass
    • EMD enhanced multi-layer deposition
    • Dual-speed focuser
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  5. Celestron C8 8 Inch Optical Tube Assembly CG-5
    AUD $2,399.00

    Backorder Available

    Out of stock

  6. Celestron C9 1/4-A XLT (CGE) Optical Tube Assembly
    AUD $3,199.00

    Backorder Available

    Out of stock

    9.25" Schmidt-Cassegrain Optical Tube Assembley

    Aluminum Optical Tube

    Celestron's premium StarBright XLT coatings

    2350 mm focal length (f/10)

    25 mm eyepiece included (94x)

    Visual back allows for use with 1.25" accessories

    6x30 finderscope to help accurately find objects

    Star diagonal provides more comfortable viewing position when observing objects that are high in the sky

    Includes dovetail rail compatible with CGE mount

    For customers wishing to fit solar filters, the outside OTA diameter is 272 mm.

    NOTE: For solar viewing the Astrozap Glass Solar filter (Product No. 124446) is recommended.

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  7. saxon 102mm Apochromatic FCD100 Air-Spaced ED Triplet Refractor Telescope
    AUD $3,299.00

    Backorder Available

    Out of stock

    • Air-spaced triplet optical design
    • Japanese made Hoya FCD100 optics
    • Advanced chromatic aberration correction
    • ED glass
    • EMD enhanced multi-layer deposition
    • Dual-speed focuser
    Learn More
  8. Sky-Watcher BD ED120 Refractor OTA
    AUD $3,699.00

    Backorder Available

    Out of stock

    120mm ED Apochromatic Refractor OTA for astrophotography. Learn More
  9. saxon 127mm Apochromatic FCD100 Air-Spaced ED Triplet Refractor Telescope
    AUD $4,499.00

    Backorder Available

    Out of stock

    • Air-spaced triplet optical design
    • Japanese made Hoya FCD100 optics
    • Advanced chromatic aberration correction
    • ED glass
    • EMD enhanced multi-layer deposition
    • Dual-speed focuser
    Learn More
  10. Celestron C11 Cassegrain OTA CGE
    AUD $4,599.00

    Backorder Available

    Out of stock

    • 11" Schmidt-Cassegrain Optical Tube Assembly (OTA)
    • Features Celestron's premium patented StarBright XLT optical coatings
    • 2800mm focal length (f/10)
    • Fastar compatible
    • Tube constructed of durable and lightweight aluminum
    • Includes: 40mm eyepiece (70x), 9x50 optical finderscope, star diagonal, 1.25” visual back, CGEM-style dovetail bar

    NOTE: For solar observing the recommended solar filter is the Astrozap Glass solar filter 308-314 mm (Product Number 124447). This solar filter is a perfect fit for this OTA. 

    Learn More

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