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 1100 EdgeHD SCT OTA
    AUD $6,999.00

    In Stock

    • Experience our best optical performance with EdgeHD’s aplanatic, flat field Schmidt-Cassegrain optics for pinpoint stars all the way to the edge of today’s largest imaging sensors and widest eyepieces
    • Aluminum optical tube with tube vents featuring an integrated 95-micron mesh filter allows hot air to be released from behind the primary mirror. Mirror support knobs hold the mirror in place and reduce image shift during imaging
    • Versatile design accommodates 3 focal ratios: native f/10, f/7 with the addition of a focal reducer, or ultra-fast f/2 imaging with a removable secondary mirror and third-party accessories
    • Celestron’s premium StarBright XLT coatings provide maximum light transmission
    • A 9x50 finderscope, 2” mirror diagonal for more comfortable viewing, and wide-angle 23 mm Luminos 2" eyepiece are all included

    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. 

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  2. NexStar Evolution 9.25" SCT
    AUD $4,999.00

    In Stock

    • Explore the Universe and control your NexStar Evolution telescope with the free Celestron SkyPortal app for iOS and Android!
    • Portable 9.25-inch Schmidt-Cassegrain optical tube with StarBright XLT optical coatings and Fastar compatibility
    • Computerized GoTo mount with high-performance worm gears and motors for improved tracking accuracy, along with reduced gear backlash
    • Rechargeable lithium-iron phosphate battery with enough power for 10 hours of continuous observing
    • Improved industrial design with manual clutches and integrated carry handles, plus the added convenience of two accessory trays and a USB charge port for your smart device
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  3. Celestron EdgeHD 925 OTA - CGE
    AUD $4,899.00

    In Stock

    Experience our best optical performance with EdgeHD’s aplanatic, flat field Schmidt-Cassegrain optics for pinpoint stars all the way to the edge of today’s largest imaging sensors and widest eyepieces

    The aluminum optical tube is fitted with tube vents which features an integrated 95-micron mesh filter that allows hot air to be released from behind the primary mirror. Mirror support knobs hold the mirror in place and reduce image shift during imaging

    Versatile design accommodates 2 focal ratios: native f/10 or ultra-fast f/2 imaging with a removable secondary mirror and third-party accessories

    Celestron’s premium StarBright XLT coatings provide maximum light transmission

    A 9x50 finderscope, 2” mirror diagonal for more comfortable viewing, and wide-angle 23 mm Luminos 2" eyepiece are all included.

    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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  4. Celestron 8 Rowe-Ackermann Schmidt Astrograph (RASA 8)
    AUD $3,649.00

    In Stock

    • Flat field free of optical aberrations like field curvature, coma, astigmatism and chromatic aberration across an entire APS-C sensor.
    • Unlike the larger RASAs that work with DSLR and large CCD cameras, the 8” model was designed with color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras in mind. The telescope does not work with standard DSLR cameras.
    • NEW Ultra-Stable Focus System – six precision sealed ball bearings virtually eliminate image shift.
    • Integrated air cooling system –12V DC MagLev fan reduces cooldown time and provides optimal air flow while filtering out dust.
    • Internal filter mount – seamlessly accommodates a Light Pollution Imaging Filter into the optical path.
    • CGE dovetail mounting rail.
    • Performs over a wider spectral range than most telescopes, from 390-800 nm, so more of the light passing through the astrograph is in sharp focus.
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  5. Celestron EdgeHD 8 Inch OTA - CGE
    AUD $2,799.00

    In Stock

    • Experience our best optical performance with EdgeHD’s aplanatic, flat field Schmidt-Cassegrain optics for pinpoint stars all the way to the edge of today’s largest imaging sensors and widest eyepieces.
    • Aluminum optical tube with tube vents featuring an integrated 95-micron mesh filter allows hot air to be released from behind the primary mirror. Mirror support knobs hold the mirror in place and reduce image shift during imaging.
    • Versatile design accommodates 3 focal ratios: native f/10, f/7 with the addition of a focal reducer, or ultra-fast f/2 imaging with a removable secondary mirror and third-party accessories.
    • Celestron’s premium StarBright XLT coatings provide maximum light transmission.
    • A 9x50 finderscope, 1.25” mirror diagonal for more comfortable viewing, and 40 mm Plössl 1.25” eyepiece are all included.

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

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  6. saxon 300DS 12 inch Astrophotography Newtonian OTA
    AUD $1,999.00

    In Stock

    You expect nothing less than crystal-clear images in your scope, but what are you going to do with the mount and tripod you already have? Mount it with the saxon 300DS Astrophotography Newtonian Telescope, that's what!

    Combined with the aperture of 300mm and focal length of 1500mm, this scope is great for prime-focus photography. Higher quality images can be achieved with the optional coma corrector

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  7. saxon 15018 Observatory 150mm Cassegrain Telescope OTA
    AUD $1,499.00

    In Stock

    Turn heads with the compact and powerful saxon 15018 Observatory Cassegrian Telescope.

    This telescope comes with a high aperture of 150mm, a focal length of 1800mm and multi-coated lens to bring you bright, high-resolution images even in dim lighting. At just under 6 kg, you'll appreciate how compact and portable this scope is when it comes to selecting the best vantage points to observe both terrestrial and astronomical objects. Just transport the optical tube, set it up on your own mount and tripod and you're ready!

    Small in size but great in specs - that's the saxon 15018 Observatory Cassegrian Telescope.

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  8. saxon 250DS 10 Inch Astrophotography Newtonian OTA
    AUD $1,269.00

    In Stock

    You expect nothing less than crystal-clear images in your scope, but what are you going to do with the mount and tripod you already have? Mount it with the saxon 250DS Astrophotography Newtonian Telescope, that's what!

    Combined with the aperture of 254mm and focal length of 1200mm, this scope is great for prime-focus photography. Higher quality images can be achieved with the optional coma corrector.

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  9. Sky-Watcher Bd Newtonian 150mm Reflector Ota
    AUD $649.00

    In Stock

    The new Sky-Watcher BKP 150 OTAW Dual Speed incorporates superb mirror-set with two significant advantages

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  10. Sky-Watcher 130/650 Dual Speed Ota Photo Reflector
    AUD $529.00

    In Stock

    • 650mm f/5 Newtonian Reflector
    • Diffraction limited 130mm parabolic primary mirror
    • Ideal fast telescope for astrophotography
    • Shortened tube length – lightweight and portable for its power
    • Feature packed at a great price
    • A great choice for beginner stargazers and veteran enthusiasts
    • Tube rings and dovetail bar included
    • Optical tube only – tripod is not included
    • 5 years Sky-Watcher limited warranty
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