Telescopes & Astronomy

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Buying your first telescope? Browse our curated selection of beginner telescopes.

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What will you use your telescope for? Explore the many uses of different types of telescopes.

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Cassegrain Telescope

Choose your telescope by optical design or learn more about the different types of telescopes.

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  1. Celestron EdgeHD 8 Inch OTA - CGE
    AUD $2,949.00

    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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  2. Celestron Advanced VX with C8 SCT
    AUD $4,249.00

    In Stock

    • 8” (203.2 mm) f/10 Schmidt-Cassegrain includes StarBright XLT coatings for better light transmission
    • 84% more light gathering than a 6” telescope.
    • 6x30 optical finderscope for locating alignment stars
    • Integer gear ratios and permanently programmable Periodic Error Correction eliminates recurring track errors from the worm gear.
    • Autoguider port for long exposure imaging
    • New motors offer improved tracking performance & provide more power to overcome load imbalances
    • Updated industrial design offers more rigidity, less flexure and improved aesthetics
    • New design allows viewing or imaging across the meridian without interference from the motors housings
    • Improved latitude range.  Can be used between 7 – 77° latitude.
    • NexStar+ hand control offers multiple language programming (English, French, Italian, German, Spanish)
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  3. Celestron CGX Equatorial 800 HD Telescope
    AUD $7,549.00

    In Stock

  4. Synscan V5 Hand Controller
    AUD $299.00

    In Stock

    • Version 5 Hand Controller
    • New version with USB Port
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  5. C9.25 Optical Tube Assembly CGE Dovetail
    AUD $3,499.00

    In 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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  6. Celestron Dovetail Bar 8 Inch CGE Wide
    AUD $89.00

    In Stock

    Wide dovetail bar to fit CGE or Losmandy style saddles

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  7. Sirius Optics 12mm Flat Field Eyepiece
    AUD $129.00

    In Stock

    The flatfield eyepieces are ideal all-rounders for deep sky and also planets with an excellent sharpness performance.

    The eyepieces have a very high quality coating and offer excellent sharpness in the field so that they are equally suitable for the deep-sky observation of nebulae and galaxies but also good for the moon and planets. The eyepieces are mutually parfocal, so that refocusing the eyepiece is not necessary.

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  8. Celestron 8 Inch Rowe-Ackermann Schmidt Astrograph RASA 8 Optical Tube Assembly with CGE Dovetail

    Regular Price: AUD $3,849.00

    Special Price AUD $3,799.00

    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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  9. WW Astro Dew heater power extension cable
    AUD $19.00

    In Stock

    Add extra cable length to your dew heaters with this RCA extension cable

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  10. WW Astro secondary mirror dew heater (S)
    AUD $49.00

    In Stock

    Dew heater for secondary mirror - small

    NOTE: Sirius Optics recommends that any dew heater strap or heated dew shield be connected to a dual channel dew controller and not directly to 12V.

    This allows the user to regulate the current and temperature of the dew heater strap or dew shield. 

    The recommended control unit is the Astrozap Dual Channel Dew Controller (Product No. 124474)

    Learn More

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