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 $749.00In Stock
The PASSION™ ED 8x/10x 32mm binoculars represent the epitome of compactness and lightness, making them an excellent gateway to premium observation optics with an unmatched balance between quality and price. With a sleek, ergonomic design crafted from high-grade magnesium materials, they ensure durability and comfort.
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AUD $2,369.00In Stock
German Precision Optics (GPO) are designed and engineered in Germany at the development and quality centre outside Munich.
GPO provides binoculars designed and tested to meet the needs of users from across the world for all their observation needs.
PASSION™ HD premium binoculars represent the height of design, function and performance they provide excellent light-transmission, edge-to-edge sharpness, close focus and brilliant colour reproduction.
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AUD $399.00In Stock
The compact ZOOMR 10x34 with it's magnesium housing makes it nice and light to use, with a clear sharp focus.
Included smartphone adaptor makes it super easy to attach your smartphone. Quality case and easy click strap makes it handy to quickly pick up and use.
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AUD $4,970.00In Stock
The NL Pure 10x52 are professional binoculars for demanding observation situations, particularly in difficult light conditions. With 10x magnification, they help you identify critical details while their field of view of 130 meters (142 yds) keeps everything in sight. This makes them particularly good for surveying open landscapes. The characteristic NL Pure wasp waist ensures the NL Pure 10x52 binoculars sit ergonomically in your hand. Maximum color fidelity and uncompromising image definition all the way to the edges are guaranteed by the proven SWAROVISION technology.
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AUD $399.00In Stock
The GOVIEW ZOOMR 8x26 Binoculars - Miami Blue are the perfect lightweight travel binoculars for any adventure.
- Fully multi-coated optics
- Light weight 348g
- K9 prism system
- Robust magnesium housing
- IPX5/6 water resistant
- Nitrogen filling (fogproof)
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AUD $469.00In Stock
Robust and lightweight: your companion for your visual adventures.
With the ZOOMR 8x42 you carry a companion that combines brilliant sharpness of detail and a compact design in a lightweight glass fibre reinforced plastic housing with a large field of view. This means that the object always remains in view, even during strong movements.
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AUD $369.00In Stock
With its durable and lightweight magnesium body, the GOVIEW® ZOOMR™ 8x26 is designed specifically for your outdoor and travel adventures where brilliant image quality is essential. With its zoom factor, you can get up close to the most incredible subjects at 8x magnification. But with its large field of view, you won't lose sight of your subject even when you're on the move.
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AUD $2,449.00In Stock
The GPO Passion HD 12.5x50 Binoculars offer 92% light transmission, HD optics, and a 2.5m close focus. Lightweight and durable, ideal for birdwatching, wildlife, and long-distance observation.
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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)
