Telescopes & Astronomy
Beginner Telescopes
Buying your first telescope? Browse our curated selection of beginner telescopes.
Shop by Use
What will you use your telescope for? Explore the many uses of different types of telescopes.
Shop by Type
Choose your telescope by optical design or learn more about the different types of telescopes.
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AUD $94.99Backorder Available
- Prevents dew from forming on your Schmidt-Cassegrain or EdgeHD corrector lens
- Fits 9.25” and 11” optical tubes
- Cutout accommodates telescope dovetail rails
- Felt-lined interior surface captures moisture and reduces stray light
- Rolls up for easy transport
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AUD $59.99Backorder Available
- Prevents dew from forming on your Schmidt-Cassegrain or EdgeHD corrector lens
- Fits 6” and 8” optical tubes
- Cutout accommodates telescope dovetail rails
- Felt-lined interior surface captures moisture and reduces stray light
- Rolls up for easy transport
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AUD $424.99Backorder Available
- Enjoy better views through your telescope with this premium diagonal featuring diffraction-limited optics and dielectric coatings
- Provides a 90° viewing angle, perfect for more comfortable viewing through refractor and Cassegrain-type telescopes
- 58 layers of dielectric coatings provide an over 99% reflective surface, ensuring the maximum amount of light collected by the telescope reaches the eyepiece
- Twist-lock keeps the eyepiece centered in the diagonal to provide better optical alignment
- Includes a stepdown adapter, so the diagonal accepts eyepieces, Barlow lenses, threaded filters, and other accessories in both 2” and 1.25” sizes
- Two interchangeable adapters allow you to switch between a Schmidt-Cassegrain thread adapter and a 2” barrel adapter so you can use this diagonal with a wide variety of telescopes
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AUD $39.00Backorder Available
SIRIUS OPTICS TBM SMARTPHONE ADAPTER
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AUD $549.00Backorder Available
The Celestron Smart Dewheater Controller 2X uses real-time data and provides just enough power for your heaters to prevent dew from forming, prolonging battery life.
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AUD $999.00Backorder Available
The Celestron Smart Dewheater Controller 4X uses real-time data and provides just enough power for your heaters to prevent dew from forming, prolonging battery life.
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AUD $24.99Backorder Available
The Celestron Thermistor for Smart Dewheater Controllers works in conjunction with Celestron's Smart DewHeater Controllers to allow "smart" control of third-party dew heaters.
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AUD $129.00Backorder Available
The Celestron Dew Heater Ring is the ideal dew prevention solution for your Celestron telescope.
The Dew Heater Ring permanently mounts to your 8" Celestron Schmidt-Cassegrain, EdgeHD, and RASA optical tube, replacing your retaining ring, so you'll never be caught without it. The installation process is quick and easy (follow the manual for instructions).
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AUD $169.00Backorder Available
The Celestron Dew Heater Ring is the ideal dew prevention solution for your Celestron telescope.
The Dew Heater Ring permanently mounts to your 9.25" Celestron Schmidt-Cassegrain and EdgeHD optical tube, replacing your retaining ring, so you'll never be caught without it.
The installation process is quick and easy (follow the manual for instructions).
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AUD $225.00Backorder Available
The Celestron Dew Heater Ring is the ideal dew prevention solution for your Celestron telescope.
The Dew Heater Ring permanently mounts to your 11" Celestron Schmidt-Cassegrain (manufactured 2006 or later), EdgeHD, and RASA optical tube, replacing your retaining ring so you'll never be caught without it.
The installation process is quick and easy (follow the manual for instructions).
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Why buy from Sirius Optics
Queensland's largest telescope showroom and warehouse
Run by astronomers and nature lovers, not sales people
Expert advice and lessons
Secure checkout with multiple payment options
30 day returns (T&Cs apply)
