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 $99.00In Stock
SAXON 8-24X40 SCOUTER MONOCULAR
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AUD $624.99In Stock
- Celestron’s legendary SkyMaster binoculars get an upgrade with ED objective lenses for superior images virtually free of chromatic aberration with lifelike color, increased resolution, and improved contrast
- Large, 70mm objective lenses offer excellent light-gathering ability—perfect for astronomy
- Threaded eyepieces accept all standard 1.25” astronomical eyepiece filters to bring out details or reduce the effects of light pollution
- BaK-4 prisms and fully multi-coated optics with XLT coatings boost light transmission through the optical path for brighter, more detailed images
- The widely spaced objective lenses of the Porro prism optical design provide an enhanced 3-D view
- Eyeglass-friendly with generous eye relief and padded twist-up eyecups
- Durable rubber-armored housing with improved ergonomics for comfortable use in the field
- Tripod-adaptable for extended viewing sessions
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AUD $649.99In Stock
- ED objective lenses provide superior images virtually free of chromatic aberration with accurate color reproduction, increased resolution and contrast
- Fully multi-coated optics for maximum light transmission through the optical path
- Phase and dielectric coated BaK-4 prisms for vivid, true-to-life colors
- Wide field of view and 8.2' close focus
- Tripod adaptable
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AUD $199.00In Stock
The Bushnell Powerview 2 8x42 Binoculars deliver sharp, vibrant images through multi-coated optics and a durable all-metal aluminum alloy chassis, built to withstand extreme temperatures without the bulk. Featuring a compact roof prism design, updated ergonomics, and a soft-touch rubber grip, these binoculars are comfortable and easy to handle even one-handed, making them ideal for birding, and outdoor adventures.
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AUD $3,089.00In Stock
When speed is paramount, there’s no substitute for a range-finding binocular. The BX-4 Range HD TBR®/W 10x42mm fuses our DNA® engine and ballistics software with the optical performance diehard hunters and shooters demand.
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AUD $599.00In Stock
The saxon Safari ED 8x42 Binoculars are tailored for avid adventurers, offering 8x magnification and a 42mm aperture for brilliant light capture and clear visuals, even in dim settings. Their lightweight yet sturdy magnesium construction ensures lasting durability and comfortable use over extended periods. The ergonomic design and included harness provide a secure grip and effortless portability during long explorations Learn More -
AUD $84.99In Stock
- High-quality everyday binoculars that are easy to take along on all life’s adventures
- Multi-coated optics increase light transmission for brighter, sharper images with high contrast
- Rugged and water-resistant rubber covered aluminum body
- Ergonomic finger ridges for a non-slip grip
- Includes a soft carrying case and neck strap
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AUD $99.99
In Stock
- Powerful 20x optical system for an image that is close-up to the action
- Large 50mm objective lenses with tremendous light gathering capability
- High-quality everyday binoculars that are easy to take along on all life’s adventures
- Multi-coated optics increase light transmission for brighter, sharper images with high contrast
- Rugged and water-resistant rubber covered aluminum body
- Ergonomic finger ridges for a non-slip grip
- Includes a soft carrying case and neck strap
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AUD $419.95In Stock
The saxon Safari ED 8x32 Binoculars deliver exceptional durability and comfort with their robust magnesium body and ergonomic design, ensuring prolonged use with ease. Equipped with phase and dielectric coatings, the advanced optics provide over 99% light transmission, offering vibrant colors and crystal-clear visuals for all viewing purposes. Learn More
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)
