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.
-
AUD $119.00In Stock
- COMPACT SOLAR BINOCULAR: This dedicated solar binocular offers 10x magnification and 25mm objective lenses with built-in filters for safe, detailed views of the Sun.
- SOLAR SAFE FILTER TECHNOLOGY: Filter conforms to the ISO 12312-2:2015(E) international safety standard for filters directly viewing of the Sun. The ideal tool for viewing eclipses, sunspots, or the Sun any day!
- PERMANENTLY ATTACHED FILTERS: Use your solar binoculars with peace of mind, knowing the filter will not be knocked off or accidentally removed.
- MULTI-COATED OPTICS: See details like sunspots clearly with added contrast from Celestron’s optical coatings.
- GENEROUS FIELD OF VIEW: Find the Sun easily and view the entire solar disk at once.
- DURABLE AND RUGGED: Rubber-armored aluminum body stands up to rough handling and harsh conditions.
-
AUD $1,849.00In Stock
GPO PASSION™ HD 10×42 Binoculars – where premium excellence meets perfection! Immerse yourself in a world of optical brilliance, fortified by robust construction, ergonomic design, and the innovative PASSIONdrop™ water-repellent coating.
The ultimate pick for avid outdoor enthusiasts, wildlife observers, passionate birdwatchers, and dedicated sport lovers! Unleash the power of your passion with GPO PASSION™ HD 10×42 Binoculars!
Learn More -
AUD $1,799.00In Stock
GPO PASSION™ HD 8×42 Binoculars — experience the premium excellence from GPO! A remarkable fusion of optical excellence, robust construction, ergonomic design and PASSIONdrop™ water-repellent coating. Engineered with attention to detail, these binoculars redefine the standards of performance and reliability.
The perfect choice for serious outdoor lovers, wildlife observers, birdwatchers and sport enthusiasts!
Learn More -
AUD $899.00In Stock
The PASSION™ ED 10x42 binocular is the ideal choice for ornithology, butterfly watching and many other observation activities in nature.The best value for money on the market with German technology.
Learn More -
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.
Learn More -
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.
Learn More -
-
-
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.
Learn More -
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)
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)
