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 $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!
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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!
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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.
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AUD $249.00
In Stock
- Great all-around binoculars for astronomy as well as scenic daytime viewing
- High-quality BAK-4 porro prisms and multi-coated binocular objective lenses ensure bright, crisp images
- Wide 7.1-degree field of view and 14 foot close focus
- Sturdy metal (not plastic) housing with large center focusing mechanism
- Includes carrying case, lens cap and deluxe wide neck strap
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AUD $1,900.00Backorder: Contact US for ETA
THE FREEDOM TO EXPERIENCE MORE
You’ll never miss out with the new CL Companion. These elegant binoculars with impressive optics fit perfectly in your hand. They are always with you to ensure you make the most of every sighting.
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AUD $1,900.00Backorder: Contact US for ETA
You’ll never miss out with the new CL Companion. These elegant binoculars with impressive optics fit perfectly in your hand. They are always with you to ensure you make the most of every sighting.
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AUD $3,610.00Backorder: Contact US for ETA
The SLC 15x56 binoculars are the expert for observing over long distances. Their 15x magnification and optimized optics, combined with outstanding edge-to-edge sharpness allow you to see special moments, even over expansive areas. The extended depressions for improved grip and the balanced weight ensure maximum comfort when using them.
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AUD $3,500.00
Backorder: Contact US for ETA
The new high-luminosity SLC 10x56 binoculars provide you with the benefit of the 10x magnification, so that you can make out details better. The optimized optical system for night use, combined with the outstanding edge-to-edge sharpness and a large field of view make observation easy for you even in poor light conditions. The extended depressions for improved grip and the balanced weight also ensure maximum comfort when using them.
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AUD $3,420.00Backorder: Contact US for ETA
SLC 8x56 W B
With the high-luminosity SLC 8x56 model, you will benefit from binoculars that offer exceptionally high transmission and you will be thrilled by their optics that have been optimized for night use, with outstanding edge-to-edge sharpness and a large field of view. The extended depressions for improved grip and the balanced weight ensure maximum comfort when using them.
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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)
