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Telescopes & Astronomy

Beginner Telescopes
Kids' Telescope

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

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Telescope Use

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. Sirius Optics ND96 0.6 Neutral Density Moon Filter 1.25 Inch
    AUD $19.00

    In Stock

    • For use with 1.25” eyepieces.
    • More light transmission than 13%, making it great for planets.
    • Reduce glare from bright objects such as the Moon, Venus, Saturn, and Jupiter.
    • Accentuate subtle detail for the Moon and planets
    • Polar ice caps of Mars in large telescopes
    • Limb hazes and terminator clouds of Mars
    Learn More
  2. Sirius Optics ND96 0.9 Neutral Density Moon Filter 1.25 Inch
    AUD $19.00

    In Stock

    • For use with 1.25” eyepieces.
    • One of the essential eyepiece filters for visual astronomy.
    • Reduce glare from bright objects such as the Moon, Venus, and Jupiter.
    • Accentuate subtle detail for the Moon and planets
    • Polar ice caps of Mars in large telescopes
    • Limb hazes and terminator clouds of Mars
    Learn More
  3. Sirius Optics ND96 0.9 Neutral Density Moon Filter 2 Inch
    AUD $39.00

    In Stock

    • For use with 2” eyepieces.
    • One of the essential eyepiece filters for visual astronomy.
    • Reduce glare from bright objects such as the Moon, Venus, and Jupiter.
    • Accentuate subtle detail for the Moon and planets
    • Polar ice caps of Mars in large telescopes
    • Limb hazes and terminator clouds of Mars
    Learn More
  4. Sirius Optics Colour Filter No. 23A Light Red 1.25 Inch
    AUD $19.00

    In Stock

    • For 1.25" eyepieces
    • Polar regions and Cloud belts of Saturn and Jupiter
    • Surface Maria and plains on Mars
    • Sky/planet contrast for Mercury and Venus
    Learn More
  5. Sirius Optics Colour Filter No. 58 Green 1.25 Inch
  6. Sirius Optics Colour Filter No. 25 Red 1.25 Inch
  7. Sirius Optics Colour Filter No. 80A Medium Blue 1.25 Inch
    AUD $19.00

    In Stock

    • For 1.25" eyepieces

    Enhances:

    • Details of cloud belts and Great Red Spot on Jupiter
    • Atmospheric clouds and polar caps on Mars
    • Feature contrast on the Moon by reducing glare
    • Cloud belts and rings on Saturn
    Learn More
  8. Sirius Optics Colour Filter No. 82A Light Blue 1.25 Inch
  9. Sirius Optics Colour Filter No. 38A Blue 1.25 Inch
    AUD $19.00

    In Stock

    • Fits 1.25" eyepieces

    Enhances:

    • Clouds and atmospheric features of Venus
    • Atmospheric clouds and polar ice caps on Mars
    • Cloud belts and moon transits of Jupiter
    • Cloud belts on Saturn
    Learn More
  10. Sirius Optics Colour Filter No. 56 Light Green

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