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Celestron Canon EOS T-Ring, T-mount for Canon EOS DSLR
Genuine Celestron product - Guaranteed compatibility and reliability. One of the first accessories you will need - If you want to take pictures through a telescope or spotting scope. Attaches to - Canon EOS DSLR and SLR camera bodies. Sturdy bayonet flange locks in place - Just like a lens, providing secure contact. Attaches to a variety of camera adapters and accessories - via standard T Threads.
In Stock
£19.90
Celestron Canon EOS-M T-Ring, T-mount for EOS M cameras
Genuine Celestron product - Guaranteed compatibility and reliability. One of the first accessories you will need - If you want to take pictures through a telescope or spotting scope. Attaches to - Canon EOS M camera bodies. Sturdy bayonet flange locks in place - Just like a lens, providing secure contact. Attaches to a variety of camera adapters and accessories - via standard T Threads.
Low Stock - order now or contact us to reserve
£19.90
Celestron Focus Motor for SCT/EDGE HD telescopes
Remote/hands-free observing - Enables electronic focusing using a computer or Celestron computerised mount hand controller. When connected to a Celestron computerised mount, the mount provides the power - When connected directly to a computer, USB provides the power. Motor controls include multiple speed rates - Automatic GoTo indexed focuser position, and focuser backlash compensation. Focuser Utility software for Windows provides a simple user interface - Also compatible with Celestron PWI. Enables autofocusing with a camera - And third party software via ASCOM. Indexed focus position allows the motor to automatically return to a previous focus position - Prevents the focus motor from reaching the end of telescope’s mechanical focus travel. New Low Price
Low Stock - order now or contact us to reserve
£244.00 £199.00
Celestron Nikon T-Ring, T-mount for Nikon DSLR
Genuine Celestron product - Guaranteed compatibility and reliability. One of the first accessories you will need - If you want to take pictures through a telescope or spotting scope. Attaches to - Nikon DSLR and SLR camera bodies. Sturdy bayonet flange locks in place - Just like a lens, providing secure contact. Attaches to a variety of camera adapters and accessories - via standard T Threads.
In Stock
£19.90
Celestron Sony T-Ring, T-mount for Sony Alpha mirrorless cameras
Genuine Celestron product - Guaranteed compatibility and reliability. One of the first accessories you will need - If you want to take pictures through a telescope or spotting scope. Attaches to - Sony Alpha mirrorless camera bodies. Sturdy bayonet flange locks in place - Just like a lens, providing secure contact. Attaches to a variety of camera adapters and accessories - via standard T Threads.
Swarovski Optik Stay on Case for 115mm Objective Module
Genuine Swarovski product - Guaranteed compatibility and reliability. Functional protection for spotting scope - Protects from impact dirt and scratches. High quality material - Form fitting sheath zips into place to provide a secure skin-tight fit. Designed for the 115mm Objective.
Low Stock - order now or contact us to reserve
£139.00 £129.00
Praktica Universal Binocular Tripod Mount Adapter
Tripod Adapter allows you to attach your binoculars to a tripod - Perfect for extended viewing sessions. Top 1/4"-20 thread - Attaches to any tripod adaptable binoculars. Base 1/4"-20 thread - Fits directly on to most tripods and car window mounts. Enables hands free viewing - Which helps reduce fatigue during long days in the field. Highly recommended - When using binoculars with large objective lenses or high magnification. Great for observing wildlife in hides. End of line - available while stocks last
Available while stocks last
£12.75
Celestron NexYZ Universal Smart Phone Adapter - 3-Axis, with Bluetooth remote
Attach your smartphone to any telescope, spotting scope, binocular, monocular or microscope - use your smartphone as a camera with a long telephoto lens. Fits any scope or binocular eyepiece from 35 mm to 60 mm in diameter - will also attach to microscopes with the addition of the included adapter ring,. Three directional knobs to perfectly align your phone in seconds - stands up to rigorous field use thanks to its robust, durable construction with a metal frame that weighs just 284 gm. Bluetooth remote - easy, shake-free wildlife, bird or star shots.
In Stock
£69.90
Celestron NexStar 6 inch SLT SCT
High quality 6” (150mm) Schmidt Cassegrain optical tube - Comes with a preassembled tripod and quick release fork arm.
Unique combination of high quality optics - User-friendly computerised interface.
Single fork arm alt-azimuth mount - Allows the telescope to track the desired objects.
Go anywhere! - Powered by 8 AA batteries (not included) or a PowerTank portable battery.
Computerised hand control - Enables you to automatically slew to any of 4,000+ celestial objects with the push of a button.
Strikes an excellent balance - Between portability, ease of use, light gathering ability and price.
Upgrading? Check our offer for your old gear
Celestron Eyepiece Filter Set, 1.25in
Add new life to your telescope - 1.25” Eyepiece & filter kit includes 14 accessories. Eyepieces - All five Plossl eyepieces can be used in any telescope with a 1.25” focuser. 2X Barlow Lens - The included 2X Barlow doubles the magnification of any 1.25” eyepiece. Filters - Coloured filters can be used to bring out certain details on a planet’s surface or its cloud structure. The Moon filter - Helps block out a portion of the light the Moon sends into your eyepiece so that you can see details better. Metal Case - The sturdy metal carry case has die-cut foam inside to protect and cushion your accessories.
Low Stock - order now or contact us to reserve
£44.90
Celestron Moon Filter Kit, 1.25in
Essential Kit - For those looking to take the next step in exploring their telescope’s full lunar capability. Four great Moon filters in one kit - Everything you’ll ever need for optimal views of the lunar surface. Three neutral density (ND) filters - Different levels of light transmission allow you to choose the perfect filter for your viewing conditions. Moon and Sky Glow filter - Provides high contrast views of the lunar surface and enhances observation of deep sky objects from light polluted skies. Aluminium filter cells - Provide a rigid, durable housing for the filter glass and are threaded on top and bottom for stacking. Kit includes a plastic carrying case - With Moon map and legend for identifying the most popular lunar features.
Celestron Neutral Density Filter, 1.25in
Reduces brightness and cuts glare. Increases clarity of the Moon, Venus, and bright double stars. 13% light transmission. Provides a true colour image. Threads on to any Celestron 1.25 inch eyepiece.
Celestron Variable Polarizing Eyepiece Filter, 1.25in
Selectively reduce the brightness of celestial objects - Brightness can be reduced to just 1% or as much as 40%. Simply rotating the filter’s lower ring - Image gets brighter or dimmer. Does not alter the colour of the object you’re observing - Making it a great choice for Astro-imaging. Darken the blue sky background when hunting for Venus or Jupiter in the daylight - Making the planet stand out from the background. Threads on to any Celestron 1.25” eyepiece - Threaded on both sides so you can stack it with other filters. New Low Price
Low Stock - order now or contact us to reserve
£39.90 £29.90
Celestron StarSense Explorer LT 127AZ
Take a guided tour of the night sky - Unleashing the power of your smartphone. StarSense sky recognition technology - Uses your smartphone to analyse star patterns overhead and calculate its position in real time. Altazimuth mount - Easy to move the telescope to find your target. Large 127mm (5”) objective lens - Expect sharp, bright views of Jupiter’s four Galilean moons. Even if you live in a light polluted city location - StarSense Explorer is advanced enough to be able to pick out Jupiter, Saturn, Venus, the Orion Nebula. Full height tripod - With an accessory tray to keep you organised. Upgrading? Check our offer for your old gear
Swarovski Optik UCS Universal Comfort Strap for NL Pure
Comfortable strap - For Swarovski NL Pure. Prevents fatigue thanks to its ergonomic design and wide neck section. Can be quickly and intuitively adjusted to the length you need via a quick-lock clasp on each side. Suitable for all NL Pure, EL, and EL Range binoculars with FieldPro package. New Low Price
In Stock
£70.00 £59.00
Nikon Monarch M5 12X42 Binoculars
Great quality, highly portable binoculars - Ideal for your next adventure. Fog-free and waterproof up to 1m. Multi-layer lens coating and Extra-low Dispersion (ED) glass to correct chromatic aberration - Provides bright images, in natural colour. Extremely light for this class of binocular. Upgrading? Check our offer for your old gear
Nikon Monarch M5 10X42 Binoculars
Great quality, highly portable binoculars - Ideal for your next adventure. Multi-layer lens coating and Extra-low Dispersion (ED) glass to correct chromatic aberration - Provides bright images, in natural colour. Extremely light for this class of binocular. Fog-free and waterproof up to 1m. Upgrading? Check our offer for your old gear
In Stock
Nikon Monarch M5 8X42 Binoculars
Great quality, highly portable binoculars - Ideal for your next adventure. Multi-layer lens coating and Extra-low Dispersion (ED) glass to correct chromatic aberration - Provides bright images, in natural colour. Extremely light for this class of binocular. Fog-free and waterproof up to 1m. Upgrading? Check our offer for your old gear
No stock. On back order with Nikon UK. No delivery date at present.
Nikon Monarch M7 10x42 Binoculars
Unprecedented visibility - With all models delivering over 60? apparent field of view, never miss a moment with the MONARCH M7 series. A bright and beautiful view - Multilayer coated lenses, prisms and ED glass, ensure a crisp and enjoyable viewing experience. Firm grip - The rubber coated chassis provides comfort over long periods of time. Made for the outdoors - Waterproof and fog-free with O-ring seals and nitrogen gas purged optics provide confidence in all weathers. Locking dioptre - Never miss a moment thanks to the dioptre adjustment ring locking system. Upgrading? Check our offer for your old gear
Nikon Monarch M7 10x30 Binoculars
Unprecedented visibility - With all models delivering over 60? apparent field of view, never miss a moment with the MONARCH M7 series. A bright and beautiful view - Multilayer coated lenses, prisms and ED glass, ensure a crisp and enjoyable viewing experience. Firm grip - The rubber coated chassis provides comfort over long periods of time. Made for the outdoors - Waterproof and fog-free with O-ring seals and nitrogen gas purged optics provide confidence in all weathers. Locking dioptre - Never miss a moment thanks to the dioptre adjustment ring locking system. Upgrading? Check our offer for your old gear
Nikon Monarch M7 8x30 Binoculars
Unprecedented visibility - With all models delivering over 60? apparent field of view, never miss a moment with the MONARCH M7 series. A bright and beautiful view - Multilayer coated lenses, prisms and ED glass, ensure a crisp and enjoyable viewing experience. Firm grip - The rubber coated chassis provides comfort over long periods of time. Made for the outdoors - Waterproof and fog-free with O-ring seals and nitrogen gas purged optics provide confidence in all weathers. Locking dioptre - Never miss a moment thanks to the dioptre adjustment ring locking system. Upgrading? Check our offer for your old gear
Nikon Monarch M7 8x42 Binoculars
Unprecedented visibility - With all models delivering over 60? apparent field of view, never miss a moment with the MONARCH M7 series. A bright and beautiful view - Multilayer coated lenses, prisms and ED glass, ensure a crisp and enjoyable viewing experience. Firm grip - The rubber coated chassis provides comfort over long periods of time. Made for the outdoors - Waterproof and fog-free with O-ring seals and nitrogen gas purged optics provide confidence in all weathers. Locking dioptre - Never miss a moment thanks to the dioptre adjustment ring locking system. Upgrading? Check our offer for your old gear
Swarovski Optik 7x21 CL Curio, Burnt Orange
Expect the unexpected - Lightest and most compact binoculars in the range. Ready to be used anywhere -Any time. Easy to handle - Small and foldable. Intuitive operation and viewing comfort -Making observation of nature a sheer pleasure. Beautifully designed by Marc Newson - Inimitable styling that’s timeless. Upgrading? Check our offer for your old gear0% Finance
Low Stock - order now or contact us to reserve
£665.00
Swarovski Optik 7x21 CL Curio, Black
Expect the unexpected - Lightest and most compact binoculars in the range. Ready to be used anywhere -Any time. Easy to handle - Small and foldable. Intuitive operation and viewing comfort -Making observation of nature a sheer pleasure. Beautifully designed by Marc Newson - Inimitable styling that’s timeless. Upgrading? Check our offer for your old gear0% Finance
Low Stock - order now or contact us to reserve
£665.00
Zeiss 20x60 Classic S Image Stabilisation Binoculars
Developed for the longest distances - Even used on missions to the International Space Station (ISS). Exceptional light transmission of the Porro-prism system - guarantees the brightest viewing images. Outstanding resolution of the finest details - Even at 20 × magnification. Unique mechanical image stabilisation system ensures a perfect viewing experience - The unavoidable shake encountered when observing handheld can be easily eliminated at the press of a button. Solid, rubber armour of the metal casing - Serve to protect the internal optics and mechanics. ZEISS T* coating - Guarantee of the brilliant, high contrast images. Upgrading? Check our offer for your old gear
Celestron Regal 10x42 ED Flat Field Binoculars
Flat field technology - Ensures edge to edge image clarity with minimal distortion. Extra low dispersion - ED glass provides high resolution and reduced chromatic aberrations. Fully multi coated optics - Maximum light transmission throughout the optical path to provide a brighter view. True to life colours - Phase and dielectric coated BaK-4 prisms provide clear and natural looking colours. Glasses friendly - Generous eye relief and sturdy, twist-up eyecups with multiple stops. Upgrading? Check our offer for your old gear
Low Stock - order now or contact us to reserve
Celestron Regal 8x42 ED Flat Field Binoculars
Flat field technology - Ensures edge to edge image clarity with minimal distortion. Extra low dispersion - ED glass provides high resolution and reduced chromatic aberrations. Fully multi coated optics - Maximum light transmission throughout the optical path to provide a brighter view. True to life colours - Phase and dielectric coated BaK-4 prisms provide clear and natural looking colours. Glasses friendly - Generous eye relief and sturdy, twist-up eyecups with multiple stops. Tripod mountable - Keep it steady with optional adapter. Upgrading? Check our offer for your old gear
Vortex Razor Ultra HD 10x50 Binoculars
Strong and versatile - Bright 50mm optics with a strong 10x magnification provide exceptional all round use. Excellent up close - Easily magnify smaller subjects with the 2m close focus. Abbe-König Prisms and Dielectric Coatings - These prisms feature multi-layer coatings which provide even more transmission. APO Optical System - APO combined with HD glass offer stunning colour and clarity. Impressive build quality - Optics are sealed with O-rings to prevent moisture whilst the outer shell is protected by ArmorTek. Tripod mountable - Keep it steady with optional adapter. Upgrading? Check our offer for your old gear0% FinanceEnd of line - available while stocks last
While stocks last - One only
Celestron StarPointer Finderscope
StarPointer Finderscope - Adds “point and look” functionality to any telescope. Red dot finder keeps the sky right-side up - Matching what you see with your unaided eyes. Adjustable red dot - Bright enough to see day or night. Attaches to just about any telescope - Thanks to the small footprint. Includes mounting base - Plus long-lasting CR2032 3V battery.
In Stock
£24.90 £22.90
Celestron StarPointer Pro Finderscope
Designed by astronomers for astronomers - Allows you to precisely zero in on your target. Projects a dual-circle reticule - Not a red dot that can obscure your subject. 40mm optical window offers a wider field of view - Acquire targets quickly and easily. Brighter LED - Easy visibility during the day. Easy dovetail connection - No tools required.
Swarovski Optik 10x30 CL Companion Binoculars, Green with Urban Jungle Pack
Design that inspires - Red Dot Award in the Product Design category. Elegant design - Beautiful aesthetics paired with high-end Roof Prisms. Ergonomic design - Compact, lightweight fits perfectly in your hands. Rugged masterpiece - Waterproof and built to the highest standard for a lifetime of use. Crystal clear - Wonderfully bright and clear viewing with vibrant and natural colours. Pack your binoculars - Stylish field bag. Upgrading? Check our offer for your old gear0% Finance
Low Stock - order now or contact us to reserve
£1,092.00
Swarovski Optik 8x30 CL Companion Binoculars, Green with Urban Jungle Pack
Elegant design - Beautiful aesthetics paired with high-end Roof Prisms. Compact design - Lightweight and beautifully ergonomic, the CL Companions fit perfectly in your hands. Rugged masterpiece - The CL Companions are waterproof and built to the highest standard for a lifetime of use. Crystal clear - Wonderfully bright and clear viewing with vibrant and natural colours. Urban Jungle Pack - Pack your binoculars in Swarovski's stylish field bag. Upgrading? Check our offer for your old gear
Swarovski Optik 8x30 CL Companion Binoculars, Green with Northen Lights Pack
Elegant design - Beautiful aesthetics paired with high-end Roof Prisms. Compact design - Lightweight and beautifully ergonomic, the CL Companions fit perfectly in your hands. Rugged masterpiece - The CL Companions are waterproof and built to the highest standard for a lifetime of use. Crystal clear - Wonderfully bright and clear viewing with vibrant and natural colours. Northern Lights carry case - Pack your binoculars in Swarovski's stylish field bag. Upgrading? Check our offer for your old gear0% Finance
Low Stock - order now or contact us to reserve
£1,064.00
Swarovski Optik 10x30 CL Companion Binoculars, Green with Northen Lights Pack
Design that inspires - Red Dot Award in the Product Design category. Elegant design - Beautiful aesthetics paired with high-end Roof Prisms. Ergonomic design - Compact, lightweight fits perfectly in your hands. Rugged masterpiece - Waterproof and built to the highest standard for a lifetime of use. Crystal clear - Wonderfully bright and clear viewing with vibrant and natural colours. Pack your binoculars - Stylish field bag. Upgrading? Check our offer for your old gear0% Finance
Low Stock - order now or contact us to reserve
£1,092.00
Zeiss Neoprene Pouch for Harpia eyepiece
Genuine Zeiss product - Quality and compatibility assured. Protects your Zeiss Victory Harpia eyepiece lens from scratches and bumps. Protects your Zeiss Victory Harpia eyepiece lens from scratches and bumps. The pouch offers extra protection against rain and other external influences.
Zeiss Stay-On Case Harpia 85
Genuine Zeiss product - Guaranteed compatibility and reliability. Stay on case - Designed for the Zeiss Victory Harpia 85. Reliable protection - Optimum carrying comfort. Quick operational readiness - Particularly in outdoor use and in the most adverse weather conditions. Eyepiece and lens covers - Designed to ensure that they can be securely fastened to the case while you are using scope.
Zeiss Stay-On Case Harpia 95
Genuine Zeiss product - Quality and compatibility assured. Designed for reliable protection - Optimum carrying comfort. Eyepiece and lens covers can be securely fastened to the case - Preventing them from flapping about in the wind or even getting lost when using the scope. Quick operational readiness - Particularly in the most adverse weather conditions.
Zeiss Terra ED 42 Hard Binocular Case
Genuine Zeiss product - Guaranteed compatibility and reliability. Replacement case - For Terra ED 8x42 and 10x42. Large opening for easy and fast access - Zipped closure. Water resistant - Impact resistant. Belt loop - Separate loop for attachment to carabiner clip, or similar fastener.
Zeiss Terra ED Pocket Hard Binocular Case
Genuine Zeiss product - Quality and compatibility assured.
Designed for Zeiss Terra ED Pocket 8x25 and 10x25 binoculars.
Designed Zeiss Terra ED Pocket 8x25 and 10x25 binoculars.
Water resistant, impact resistant, robust material.
Zeiss Terra ED 32 Hard Binocular Case
Genuine Zeiss product - Quality and compatibility assured.
Designed for Zeiss Terra ED 8x32 and 10x32.
Designed for Zeiss Terra ED 8x32 and 10x32.
Water-resistant, impact-resistant, robust material.
Swarovski Optik 10x32 NL Pure Binoculars, Green
Wide view - The enormous field of view ensures a constant overview of the action even at high magnification. Optical perfection - Swarovision technology guarantees spectacular sharpness with incredible colour fidelity and transmission. Ergonomic - The new revolutionary wasp waist shape guarantees relaxed viewing, even for longer periods. Rugged - The sleek and beautiful design is backed by a rugged, waterproof construction that will never let you down. Dawn to dusk - The large 32mm objective lens makes this perfect for demanding users who rely on excellent performance in difficult light conditions. Upgrading? Check our offer for your old gear0% Finance
Good Stock
£2,090.00
Swarovski Optik 8x32 NL Pure Binoculars, Burnt Orange
Wide view - The enormous field of view ensures a constant overview of the action even at high magnification. Optical perfection - Swarovision technology guarantees spectacular sharpness with incredible colour fidelity and transmission. Ergonomic - The new revolutionary wasp waist shape guarantees relaxed viewing, even for longer periods. Rugged - The sleek and beautiful design is backed by a rugged, waterproof construction that will never let you down. Dawn to dusk - The large 32mm objective lens makes this perfect for demanding users who rely on excellent performance in difficult light conditions. Upgrading? Check our offer for your old gear0% Finance
Good Stock
£2,050.00
Swarovski Optik 10x32 NL Pure Binoculars, Burnt Orange
Wide view - The enormous field of view ensures a constant overview of the action even at high magnification. Optical perfection - Swarovision technology guarantees spectacular sharpness with incredible colour fidelity and transmission. Ergonomic - The new revolutionary wasp waist shape guarantees relaxed viewing, even for longer periods. Rugged - The sleek and beautiful design is backed by a rugged, waterproof construction that will never let you down. Dawn to dusk - The large 32mm objective lens makes this perfect for demanding users who rely on excellent performance in difficult light conditions. Upgrading? Check our offer for your old gear0% Finance
In Stock
£2,090.00
Swarovski Optik 8x32 NL Pure Binoculars, Green
Wide view - The enormous field of view ensures a constant overview of the action even at high magnification. Optical perfection - Swarovision technology guarantees spectacular sharpness with incredible colour fidelity and transmission. Ergonomic - The new revolutionary wasp waist shape guarantees relaxed viewing, even for longer periods. Rugged - The sleek and beautiful design is backed by a rugged, waterproof construction that will never let you down. Dawn to dusk - The large 32mm objective lens makes this perfect for demanding users who rely on excellent performance in difficult light conditions. Upgrading? Check our offer for your old gear0% Finance
Low Stock - order now or contact us to reserve
£2,050.00
Swarovski Optik Universal Comfort Strap for EL Rangefinder binoculars
Padded comfort strap - For the Swarovski EL Range. Keeps your binoculars accessible - When out in the field. Great accessory - For the Swarovski EL Range TA Binoculars. Form-fitting - Mesh type strap system for added comfort. Adjustable - Toggles to ensure security and convenience.
Low Stock - order now or contact us to reserve
£70.00
Swarovski Optik 10x42 TA Binoculars, Green
Range finding binoculars - With Tracking Assistant. Integrated tilt indicator with a unique angle shot program - Displays either the adjusted shooting distance or the angle. Precise measurements - From a distance of 10 meters. Smartphone app - Configure the binoculars to your specific needs and individual ballistics data. Ideal for numerous viewing opportunities - Right up to twilight. tracking assistant -Helps you to narrow down the area where your last shot hit the target. Upgrading? Check our offer for your old gear0% Finance
Low Stock - order now or contact us to reserve
£2,917.00
Swarovski Optik 8x42 TA Binoculars, Green
Swarovision technology - Spot game quickly and accurately thanks to the precision and edge-to-edge sharpness. Highly configurable - You can transfer your own ballistics data, along with air pressure and temperature readings. Long range - The huge measuring range of 10 - 2000m means you can spot your target far easier. Exquisite usability - Their expansive field of view and large exit pupil ensure optimum comfort during your observations. Go anywhere - From -10 to +55 °C, these are made to withstand even the harshest of environments. Upgrading? Check our offer for your old gear
Swarovski Optik Forehead Rest for EL Rangefinder Binoculars
Genuine Swarovski product - Guaranteed compatibility and reliability. Comfortable viewing - The forehead rest provides a stable yet comfortable experience over extended periods. Tailored to you - The forehead rest has been designed to suit you and can be easily adjusted for perfect alignment. Great for glasses - Helps glasses wearers to get the perfect distance to the eyepiece. Provides stable 3-point support - For maximum stability.
Low Stock - order now or contact us to reserve
£129.00
Browse our stock of Binoculars, Monoculars, Telescopes, and Spotting Scopes. We have something to suit everyone, from the budding Urban Birder to the junior Astronomer. We stock optics from Swarovski, Canon, Steiner, Zeiss, Nikon, Celestron, and Vortex.
The specification, eg 8x40, describes the magnification followed by the diameter of the front glass in millimetres. The first number divided into the second gives the light gathering power. Thus, a pair of 8x32 will be as bright as a pair of 10x40 but smaller and with less magnification.
Sizes up to 8x25 or 10x25 will slip into a trouser pocket. Cost, size and weight all go up as either number increases. It also becomes increasingly difficult to hold them steady without a support. All high-quality Binoculars and Spotting scopes come with a tripod fitting.
If you are able to call into either shop and discuss your requirement, we will be more than happy guide you towards the best compromise between magnification, brightness, weight, cost and quality.
Which is better? A spotting scope or binoculars?
For serious, long-range viewing, maintaining light gathering power at high magnifications involves a fair amount of glass that is both heavy and expensive. Making do with the view through just one eye has its advantages. Also, the stereo vision obtained from using both eyes diminishes with distance. A serious birder will mostly commonly be seen with a spotting scope, firmly attached to a tripod, slung over one shoulder en-route (excuse my French) to the next location.
Swarovski are the Spotting-Scope masters and their modular system is the pinnacle. In recent years, they have introduced the BTX binocular eyepiece so that you can pretty much have the best of both worlds.