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 $3,550.00Backorder: Contact US for ETA
With 8 X magnification, the NL Pure Green 8 x 32 binocular brings you closer to the action.
These binoculars are perfect for bird watching in close cover such as rainforest.
NOTE: Does not come with headrest. Headrest is an optional extra.
Phils Review: "If you are looking for the a light high end binocular to look at birds or wildlife in close cover or heavy rainforest then this is the pair for you. The optics really pull out the detail of the birds in the trees."
Learn More -
AUD $3,550.00Backorder: Contact US for ETA
With 8 X magnification, the NL Pure Burnt Orange 8 x 32 brings you closer to the action.
These binoculars are perfect for bird watching in close cover such as rainforest.
NOTE: FRP Forehead Rest is NOT included. This is separate item.
Learn More -
AUD $3,620.00Backorder: Contact US for ETA
When every detail counts – with 10x magnification, the NL Pure 32 guarantees you won’t miss a thing.
NOTE: FRP Forehead Rest is NOT included. This is separate item.
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AUD $299.99Backorder Available
- BaK-4 Prisms w/ Phase Coating: Increases contrast and resolution for sharper more detailed images
- Fully Multi-Coated Optics: Allows maximum light transmission through the optical path for brighter images
- 6.5’ Close Focus: Detailed, up close observation of subjects in close proximity. Ideal for watching birds, insects, plants, etc.
- Compact and Lightweight: Fits in a pocket or glove box; easy to carry on long excursions
- Twist-up Eyecups: Twist up and down with multiple stops for correct positioning of the users eyes for comfortable viewing with or without eyeglasses
- Polycarbonate frame: Strong and durable polycarbonate body. Provides structural integrity while keeping the weight to a minimum.
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AUD $1,120.00Backorder: Contact US for ETA
Swarovski Optik's most compact and affordable binoculars yet. Learn More -
AUD $1,120.00Backorder: Contact US for ETA
Swarovski Optik's most compact and affordable binoculars yet. Learn More -
AUD $274.99Backorder Available
- 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 $499.99Backorder Available
- 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 9.8 feet for viewing nearby subjects
- Sturdy, twist-up eyecups with multiple stops. Eyeglass friendly with 16 mm of eye relief
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AUD $249.00Backorder Available
- 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 $269.00Backorder Available
- 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)
