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 $749.00Backorder Available
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.
Learn More -
AUD $99.99Backorder Available
- 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
-
AUD $84.99
Backorder Available
- 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
-
AUD $599.00Backorder Available
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 $119.99Backorder Available
- Multi-Coated Optics
- Waterproof and Fogproof
- Protective Rubber Covering
- Twist-up Eyecups for Quick Adjustment
- Moisture Resistant Neoprene Carrying Case
- Limited Lifetime Warranty
-
AUD $59.00Backorder Available
- High quality monocular at an affordable / economical price
- Multi-coated optics increase light transmission resulting in brighter and sharper images with high contrast levels
- Stylish rubber covered aluminum body protects from rough handling
- Ergonomic thumb indents and finger ridges for extra non-slip comfort and ease of use
- Water resistant
- Soft carrying case
- Binocular straps
-
AUD $89.99Backorder Available
- High-quality everyday binoculars that are easy to take along on all life’s adventures
- Large 50mm objective lenses with tremendous light gathering capability
- 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
-
AUD $6,880.00Backorder: Contact US for ETA
Swarovski AX Visio 10X32 Binocular
Learn More -
AUD $699.99Backorder Available
- 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
- Tripod adaptable
-
AUD $599.99Backorder Available
- Large 80 mm objective lenses for excellent light gathering in low light conditions or for astronomical observing
- Detachable RSR rail for attaching an optional red dot finderscope
- Rubber armored for improved ergonomics and protection from every day use in the field
- Waterproof and nitrogen purged for use in all weather conditions
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)
