Binoculars & Monoculars
Binoculars & Monoculars
Choosing the right binoculars or monoculars can feel overwhelming—there are hundreds of options across wildly different price points and use cases. At Sirius Optics, our team of astronomers and nature lovers are here to cut through the confusion and help you find the perfect pair for your needs and budget.
Not sure where to start? Visit our Brisbane showroom, try a few pairs side by side, or give us a call. And if you buy online and the binoculars aren't quite right, we offer a 30-day return policy for store credit.
Understanding Binocular Specs: What Do the Numbers Mean?
You'll see binoculars described with numbers like 8x42, 10x50, or 10-30x50. Here's what they mean:
- The first number is the magnification. An 8x42 binocular magnifies 8 times; a 10-30x50 is a zoom binocular ranging from 10x to 30x.
- The second number is the diameter of the front (objective) lens in millimetres. A larger objective lens gathers more light, giving you a brighter image — especially useful in low light conditions like dawn, dusk, or stargazing.
The trade-off: larger lenses mean larger, heavier binoculars. For handheld use, 42mm is a popular sweet spot between brightness and portability.
What Else Should You Consider?
Beyond magnification and lens size, a few other features are worth knowing:
- Waterproofing & fogproofing
Most modern binoculars are sealed against moisture and nitrogen-purged to prevent internal fogging, making them suitable for outdoor use in all conditions.
- Size & weight
Binoculars with 50mm+ objective lenses can become tiring to hold for extended periods. If you plan to use them for birdwatching or hiking, compact or mid-size models are often more comfortable.
- Specialist features
Marine binoculars may include built-in compasses and floating designs; astronomy binoculars prioritise large apertures for maximum light gathering; image-stabilised models reduce shake at higher magnifications.
What About Monoculars?
Think of a monocular as a compact, single-eye alternative to binoculars — lighter, more pocketable, and surprisingly capable. Some people call them "half a binocular", but there's nothing half-hearted about them. Modern monoculars can include night vision technology, smartphone adapters, and even automatic bird and wildlife identification — making them a versatile choice for travellers, hikers, and wildlife enthusiasts.
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AUD $2,345.00In Stock
This is a special order item and may take longer than normal to arrive due to to COVID-19 impacts.
Extendable spotting scopes from SWAROVSKI OPTIK have been performing in harsh conditions for decades. They are simple to use, lightweight, and can be easily packed away due to their manageable dimensions.
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AUD $1,185.00In Stock
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AUD $49.99In Stock
- High quality binoculars at an affordable / economical price
- Multi-coated optics increase light transmission resulting in brighter and sharper images with high contrast levels
- Stylish rubber covered aluminum body protects from rough handling
- Ergonomic thumb indents and finger ridges for extra non-slip comfort and ease of use
- Water resistant
- Soft carrying case
- Binocular straps
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AUD $265.00In Stock
- 100% Waterproof and Fogproof
- Armor Coated
- BAK 4 Prisms
- Central Focus Dial
- Diopter Focus
- Fully Multi-coated Lens System
- Inverted Porro Prism Design
- Proprietary Nitrogen Fill Process
- Twist Up Eyecups
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AUD $4,545.00In Stock
NL Pure - the revolutionary binoculars with the largest field of view to date and barely perceptible edges, without compromising on ergonomics and handling. In other words: Best optics, packed in the smallest possible size. The NL Pure thus provides unprecedented nature experiences.
NOTE: FRP Forehead Rest is NOT included. This is a separate item.
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AUD $199.00In Stock
The saxon 7x50 Focus Free Oceanfront Binoculars are a great multi-purpose pair of binoculars to use on land and at sea.
Waterproof and fogproof, this 7x magnification binoculars comes with quality BaK-4 prisms and multi-coated optics to give amazing views.
Suitable for users of all levels - use them on the boat, on the beach, or for birdwatching - the choices are endless!
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AUD $99.00In Stock
SAXON 8-24X40 SCOUTER MONOCULAR
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AUD $274.99In Stock
- Designed with the outdoor enthusiast in mind, waterproof and fully rubber armored.
- Phase coated BaK-4 prisms for increased contrast and resolution.
- Fully multi-coated optics provide brighter images by increasing light transmission through the entire optical path.
- Close focus of 6.5 feet for viewing nearby subjects.
- Sturdy, twist-up eyecups with multiple stops. Eyeglass friendly with 17.5 mm of eye relief.
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AUD $249.00In Stock
- 15x magnification porro prism binocular
- Large 70 mm objective lens offers maximum image brightness in low-light and long-range conditions
- Ultra sharp focus across the field of view
- Multi-Coated optics for sharp, clear views
- Suitable for terrestrial or astronomical viewing
- Protective rubber covering for ultra-firm grip
- Large center focus knob for easy focusing
- Tripod adapter included
- Long eye relief ideal for eyeglass wearers
- Carrying case included for travel and safe storage
- Limited Lifetime Warranty provides best protection and product support on the market
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AUD $269.00In Stock
- 25x magnification porro prism binocular
- Large 70 mm objective lens offers maximum image brightness in low-light and long-range conditions
- Ultra sharp focus across the field of view
- Multi-Coated optics for sharp, clear views
- Suitable for terrestrial or astronomical viewing
- Protective rubber covering for ultra-firm grip
- Large center focus knob for easy focusing
- Long eye relief ideal for eyeglass wearers
- Carrying case included for travel and safe storage
- Limited Lifetime Warranty provides best protection and product support on the market
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)
