• display as grid Grid
  • display as list List

£30 Saving
Celestron TrailSeeker 8x42 Roof Prism BinocularsCelestron TrailSeeker 8x42 Roof Prism Binoculars
11% off
Percent Off
Celestron TrailSeeker 8x42 Roof Prism Binoculars
Durable construction - The rubber coated magnesium alloy body protects your TrailSeeker binoculars from damage without weighing you down.  Fully multi coated optics - Maximum light transmission throughout the optical path to provide a brighter view.  Crisp and clear - The high quality BaK-4 prisms and multi-coated optics provide enhanced contrast.  Glasses friendly - Generous eye relief and sturdy, twist-up eyecups with multiple stops.  Carry case - The included soft carry case protects your binoculars when they're not in use.  Upgrading? Check our offer for your old gear

in stock Low Stock - order now or contact us to reserve

£269.00 £239.00
£60 Saving
Hawke Endurance ED Marine 7 x 50 Binoculars with CompassHawke Endurance ED Marine 7 x 50 Binoculars with Compass
15% off
Percent Off
Hawke Endurance ED Marine 7 x 50 Binoculars with Compass
Extra-low Dispersion glass - Plus High Resolution phase corrected BAK-4 roof prisms for optimum clarity.  Waterproof to IP67 - Purged and filled with dry nitrogen and tested against the effects of temporary immersion down to 1m for 30 minutes.  Lightweight and durable rubber coated chassis.  Illuminated Compass for easy visibility in poor light.  Focus knob with 1.2 turns from 2m close focus to infinity - and beyond!.  Upgrading? Check our offer for your old gear

in stock Low Stock - order now or contact us to reserve

£379.00 £319.00

£110 Black Friday Early Bird Saving
Hawke Frontier HD X 10x42 Binoculars, Green
29% off
Percent Off
Hawke Frontier HD X 10x42 Binoculars, Green
Dielectric Coatings - Provide increased light reflectivity.  Full size top hinge chassis - twist-up eye cups.  Lightweight rubber coated - Magnesium alloy chassis.  Waterproof and Fog Proof - Nitrogen Purged .  Fully Multi Coated optics to produce sharp images - High resolution Phase Corrected BAK-4 roof prisms.  Hawke No Fault Lifetime Warranty - It doesn't matter how it happened or whose fault it was.  Upgrading? Check our offer for your old gearNew Low Price New this month

in stock Good Stock

£369.00 £259.00
£20 Discount
Hawke Frontier HD X 8x42 Binoculars, Green
Sale
Hawke Frontier HD X 8x42 Binoculars, Green
Dielectric Coatings - Provide increased light reflectivity.  Full size top hinge chassis - twist-up eye cups.  Lightweight rubber coated - Magnesium alloy chassis.  Waterproof and Fog Proof - Nitrogen Purged .  Fully Multi Coated optics to produce sharp images - High resolution Phase Corrected BAK-4 roof prisms.  Hawke No Fault Lifetime Warranty - It doesn't matter how it happened or whose fault it was.  Upgrading? Check our offer for your old gear

No stock on site. Please allow 10 days for delivery

£349.00 £329.00

£100 Black Friday Early Bird Saving
NocPix LUMI L19 Thermal Imaging MonocularNocPix LUMI L19 Thermal Imaging Monocular
11% off
Percent Off
NocPix LUMI L19 Thermal Imaging Monocular
Thermal imaging monocular - Designed for use both at night time and during the day.  Provides exceptional image quality even in adverse weather conditions - And beyond obstacles like branches, tall grass, dense foliage, etc.  Small size and light weight - Making it easy to carry.  LUMI thermal imagers are designed for various applications - Including Observation, security, terrain orientation, search and rescue operations, etc.  Magnification 2 – 8x - Field of view - 13.8º x 10.4º.  Detective range - 980m.  Upgrading? Check our offer for your old gear0% Finance

in stock Low Stock - order now or contact us to reserve

£899.00 £799.00
£100 Saving
NocPix LUMI L35 Thermal Imaging MonocularNocPix LUMI L35 Thermal Imaging Monocular
Sale
NocPix LUMI L35 Thermal Imaging Monocular
Thermal imaging monocular - Designed for use both at night time and during the day.  Provides exceptional image quality even in adverse weather conditions - And beyond obstacles like branches, tall grass, dense foliage, etc.  Small size and light weight - Making it easy to carry.  LUMI thermal imagers are designed for various applications - Including Observation, security, terrain orientation, search and rescue operations, etc.  Magnification - 2.5 – 20x - Field of view 7.5º x 5.7º.  Detective range - 1800m.  Upgrading? Check our offer for your old gear0% Finance

in stock Low Stock - order now or contact us to reserve

£1,269.00 £1,169.00

£46 Saving
Steiner BluHorizons 8x22 BinocularsSteiner BluHorizons 8x22 Binoculars
20% off
Percent Off
Steiner BluHorizons 8x22 Binoculars
BLUHORIZONS with Autobright technology - That's light protection for the eyes.  Specially designed for all outdoor adventurers - Fits in almost any pocket .  Phototropic lenses - Automatically adjusts to the light conditions, always have optimal vision even in bright sunshine or light reflections.  Minimal, stepless focusing on the centre drive - Fast absolute sharpness from close up to infinity.  Outstanding robustness - Non slip NBR long-life rubber armour resists oil, acid and weather influences.  Ergonomic eyecups - Made of skin friendly, non ageing silicone enable observation comfort and protection.  Upgrading? Check our offer for your old gear

in stock While stocks last - Two Only

£224.95 £178.95
£90 Black Friday Early Bird Saving
Steiner Navigator Autobright 7x50 Binoculars with CompassSteiner Navigator Autobright 7x50 Binoculars with Compass
11% off
Percent Off
Steiner Navigator Autobright 7x50 Binoculars with Compass
Sunlight-adaptive - The outstanding Autobright technology automatically adjusts the brightness to the respective lighting conditions.  Comfortable and stable - The wave-like rubber armor texture not only provides a firm grip but also repels water to ensure non-slip handling in heavy seas.  Crystal clear - The proven STEINER high-contrast optics ensure bright, high-contrast images with natural colour reproduction.  Robustness and reliability - Developed in close cooperation with professional sailors, these binoculars are designed to perform reliably and efficiently even in the most difficult conditions.  Integrated compass - The built-in analogue liquid-damped compass is not only shock-absorbing, but also precise and illuminable.  Upgrading? Check our offer for your old gear

in stock Low Stock - order now or contact us to reserve

£789.00 £699.00

£8 Black Friday Early Bird Saving
Swarovski SC Cap JuniorSwarovski SC Cap Junior
28% off
Percent Off
Swarovski SC Cap Junior
Stylish - The nature enthusiasts of tomorrow can look cool while out and about on their adventures.  Classic design - The baseball design not only looks cool but helps to keep stray light out of the eyes.  Comfortable - A soft and comfortable fit that is easily adjustable with the clamp at the rear.  Breatheable - Thanks to the 100% cotton construction, it is fully breatheable and great for keeping a cool head.  

in stock Available while stocks last

£27.75 £19.75
£390 Saving
Vortex Razor Ultra HD 10x50 binocularsVortex Razor Ultra HD 10x50 binoculars
24% off
Percent Off
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

in stock While stocks last - Two Only

£1,588.95 £1,198.95

£350 Saving
Vortex Razor Ultra HD 8x42 BinocularsVortex Razor Ultra HD 8x42 Binoculars
22% off
Percent Off
Vortex Razor Ultra HD 8x42 Binoculars
Classic combo - This wide-aperture binocular with 8x magnification is ideal for all year round use in the British woodlands.  Excellent up close - Easily magnify smaller subjects with the 1.4m 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

in stock While stocks last - Two Only

£1,528.95 £1,178.95
£70 Black Friday Early Bird Saving
Zeiss 3x12 Pocket MonocularZeiss 3x12 Pocket Monocular
16% off
Percent Off
Zeiss 3x12 Pocket Monocular
Versality - Monoculars are the masters of versality, great for sporting events, theatre or the great outdoors.  Zeiss T* Coating - for brilliant high contrast images especially in adverse light conditions and in twilight.  .  Zeiss T* Coating - for brilliant high contrast images especially in adverse light conditions and in twilight.  .  Bino to Scope - The 3x12 monocular can attach to your Victory FL and Conquest binoculars with an adapter, tripling your magnification of your bino's.  Upgrading? Check our offer for your old gear

in stock Low Stock - order now or contact us to reserve

£425.00 £355.00

£449 Saving
Zeiss Conquest HD 8x56 BinocularsZeiss Conquest HD 8x56 Binoculars
32% off
Percent Off
Zeiss Conquest HD 8x56 Binoculars
Perfect All Rounder - Outstanding performance, great ergonomics and optics.  HD Lenses - Zeiss T* multicoating allows for clear and precise details in Twilight, coupled with 90% light transmission giving brilliant high contrast images.  Comfort - The optimised ergonomics and a large exit pupil allow for a relaxed and undisturbed viewing experience.  Locutec - Zeiss developed LotuTec®. A coating for the lenses of binoculars and spotting scopes that enables a clear and unhindered view in all weather conditions.  Upgrading? Check our offer for your old gear0% FinanceEnd of line - available while stocks last

in stock While stocks last - One only

£1,398.95 £949.95
£120 Saving
Zeiss Terra ED 10x32 Binoculars, Black/Green
25% off
Percent Off
Zeiss Terra ED 10x32 Binoculars, Black/Green
Robust - Sleek design, reliable and easy to use, waterproof and nitrogen filled.  ED Glass - Great light transmission with Hydrophobic anti reflective coating for optical clarity and precision.  Focus - Comfortable, large focus wheel makes for easy and above all quick focusing.  Upgrading? Check our offer for your old gear

in stock Low Stock - order now or contact us to reserve

£478.95 £358.95

£120 Saving
Zeiss Terra ED 10x32 Binoculars, Black/GreyZeiss Terra ED 10x32 Binoculars, Black/Grey
25% off
Percent Off
Zeiss Terra ED 10x32 Binoculars, Black/Grey
Robust - Sleek design, reliable and easy to use, waterproof and nitrogen filled.  ED Glass - Great light transmission with Hydrophobic anti reflective coating for optical clarity and precision.  Focus - Comfortable, large focus wheel makes for easy and above all quick focusing.  Upgrading? Check our offer for your old gear

in stock Low Stock - order now or contact us to reserve

£478.95 £358.95
£50 Black Friday Early Bird Saving
Zeiss Terra ED 8x42 Binoculars, Black/GreenZeiss Terra ED 8x42 Binoculars, Black/Green
10% off
Percent Off
Zeiss Terra ED 8x42 Binoculars, Black/Green
Robust - Sleek design, reliable and easy to use, waterproof and nitrogen filled.  ED Glass - Great light transmission with Hydrophobic anti reflective coating for optical clarity and precision.  Focus - Comfortable, large focus wheel makes for easy and above all quick focusing.  Upgrading? Check our offer for your old gear

in stock Low Stock - order now or contact us to reserve

£479.00 £429.00

£190 Black Friday Early Bird Saving
Zeiss Victory SF LotuTec 10x32 Binoculars, BlackZeiss Victory SF LotuTec 10x32 Binoculars, Black
Sale
Zeiss Victory SF LotuTec 10x32 Binoculars, Black
High end optics - Designed for Birders and Twitchers.  High quality optics - LOTUTEC provides a clear view, whatever the weather due to dust and water repellent surfaces.  Ultra-wide field of view - 130m field of view.  Ergonomic placement of the focusing wheel - Allows you to keep your fingers and hand relaxed.  ZEISS T* Coating - Guarantee of the brilliant, high contrast images.  ErgoBalance Concept - observe comfortably for longer.  Upgrading? Check our offer for your old gear0% FinanceTen Year UK Warranty

in stock Low Stock - order now or contact us to reserve

£2,139.00 £1,949.00
£110 Saving
Celestron Astromaster 130EQ-MD Reflector TelescopeCelestron Astromaster 130EQ-MD Reflector Telescope
32% off
Percent Off
Celestron Astromaster 130EQ-MD Reflector Telescope
Discover our Solar System - You’ll be ready to observe in minutes thanks to the quick and easy no-tool setup.  Manual German equatorial mount with setting circles - To accurately locate and track sky objects.  Motor drive - Automatically tracks celestial objects .  Two eyepieces offer different magnifications for low and high powered views - The 20mm has a built-in erect image corrector.  Download Celestron’s Starry Night Software - Learn about the night sky, celestial objects,.  Adjustable, full height steel tripod - With deluxe accessory tray.  Upgrading? Check our offer for your old gear

in stock Low Stock - order now or contact us to reserve

£339.00 £229.00

£300 Saving
Celestron NexStar Evolution 5inch SCT Computerised Reflector TelescopeCelestron NexStar Evolution 5inch SCT Computerised Reflector Telescope
19% off
Percent Off
Celestron NexStar Evolution 5inch SCT Computerised Reflector Telescope
Schmidt Cassegrain telescope with integrated WiFi - Leave your hand control behind and slew to all the best celestial objects with a tap of your smartphone or tablet.  Compact, portable 5-inch optical tube - StarBright XLT optical coatings.  Computerised GoTo mount with high-performance worm gears and motors - Improved tracking accuracy along with reduced gear backlash.  Rechargeable internal lithium-iron phosphate battery - Enough power for 10 hours of continuous observing.  All metal tripod - Features a metal accessory tray with indentations for storing and carrying the tripod.  Equipped with four auxiliary ports - Two on top of the fork and two on the bottom.  Upgrading? Check our offer for your old gear0% Finance

in stock Low Stock - order now or contact us to reserve

£1,529.00 £1,229.00
£50 Black Friday Early Bird Saving
Celestron UpClose 20-60x60 Angled Spotting ScopeCelestron UpClose 20-60x60 Angled Spotting Scope
33% off
Percent Off
Celestron UpClose 20-60x60 Angled Spotting Scope
UpClose Spotting Scope - Good choice for bird watching, nature or wildlife observation.  Fully coated optics - Refractor optical design.  Extremely lightweight - Under two pounds.  Comes with - A soft case and an aluminium case.  High quality optics - Water resistant.  Tabletop tripod - Provides a steady base for long duration or long distance viewing.  

in stock While stocks last - One only

£148.75 £98.75

£250 Black Friday Early Bird Saving
Swarovski TLS APO 30 TX Apochromatic telephoto lens adapter
65% off
Percent Off
Swarovski TLS APO 30 TX Apochromatic telephoto lens adapter
Top quality digiscoping - APS-C/DX single-lens reflex cameras .  Excellent optical quality - Developed as a complete system with the new ATX/STX spotting scopes.  

in stock Low Stock - order now or contact us to reserve

£378.95 £128.95

Black Friday Deals on Binoculars

Looking for the best Black Friday deals on binoculars? We have offers on all the major binocular brands and models to make sure that you get the best value for money this Black Friday. Whether you’re looking for a good deal on a premium brand like Canon or looking for a more affordable set of binoculars like the Vortex Diamondback, or Hawke Endurance we’ve got savings for everyone this year.

Black Friday Canon Binoculars 2024, Black Friday Vortex Binoculars 2025, Black Friday Celestron Binoculars 2025, Black Friday Hawke Binoculars 2025, Black Friday Zeiss Binoculars 2025.

 

 

How do I choose a pair of binoculars?

When choosing a pair of binoculars, bear in mind that the first number is the magnification and the second is the diameter of the front glass in millimetres. The first number divided into the second gives the light gathering power. Thus, all things being equal, a pair of 8x32 will be as bright as a pair of 10x40 but smaller and less powerful.

8x42s (with a light factor just over 5) are the classic choice for all-year-round birdwatching.  8x22s or 25s are considerably smaller & lighter and are perfectly good in bright conditions. As the size and magnification increase, eg to 10x ,15x, or even up to 25x, it is increasingly difficult to hold them steady without a support. 

Canon binoculars all have a battery-powered image stabiliser which makes a big difference if you are unable to use a tripod, monopod or a handy branch. For example, in a crowd or bumping around in the back of a reasonably uncomfortable Land Rover.

The best way to select a pair of binoculars is to call in and weigh up the price, weight, magnification, brightness and quality that suits you Sir.  Or madam. 

We're here to help. Remember!  The more you invest in your optics, the less there will be left for the children to waste.

Here are our answers to some of the questions that people ask. 

What does 10x50 mean for binoculars? 

Every pair of binoculars has two numbers applied to it (in this case, 10x50). 10x indicates a ten times magnification.  Anything you look at will be ten time bigger than the naked eye.

The second figure is the width of the front glass (technically the diameter of the objective lens in millimetres) which gives an indication of the brightness.

Dividing the first number into the second produces a brightness factor.  So an 8x32 pair have a factor of 4 and will be as bright as a 10x40 or 12x48 or 20x80. The 10x50 will be slightly brighter so are ideal for using in poor light where the weight is not a problem.  For example, leaning on the back of your chair looking at the stars.

7x50s with a factor of 7 and a bit are the brightest in common use and are popular with sailors finding their way home from the pub. The Steiner Navigator Pro come with a compass but, sadly, not a bottle opener.

What strength binoculars do I need?

The magnification, or strength, that you choose for your binoculars is dependent on what you’ll be using them for and how much weight you want to carry around. For general use, a magnification from 7x to 12x will be sufficient and as much as you can hold steady without shaking.  8x and 10x are the most popular for general use. 

Remember that the brightness of view depends on the width of the front glass divided by the magnification. All things being equal, as the magnification doubles the size and weight go up four times.

If you like to go for long walks on sunny days, a good compact pair will save you carrying around a lot of heavy glass that you don’t need.

On the other hand, if you like to sit on your balcony and watch the boats go buy or do a bit of star-gazing, the biggest pair possible on a good tripod will be just the thing. 

What should I look for when buying binoculars?

Once you have decided on the size, there are a few features that may make a difference and could be worth paying a little more for.

The main difference with a more expensive pair is the quality of the optics.  The quality of the image depends on both the quality of the glass itself and the precision of the grinding. The search for perfection is an expensive business, involving exotic glasses and an obsession with precision grinding spanning several generations. A really top quality pair will quickly get you into four figures.

All the quality in the world will not help you if you can’t hold them steady. If you are short of a friend to lean on occasionally, make sure that you choose a pair that either will attach to a tripod or clamp or come with stabilisation. Alternatively, stich some leather patches on to the elbows of your walking jacket.

The mechanical quality is probably the next thing to check.  A smooth focusing action down to close distances will cost you more than a less ambitious construction.

If you wear spectacles, you will want to look out for binoculars with long eye relief which allows you to use them without having to take your specs off every time.

If you venture out in all weathers, or on small boat, you will need a gas-filled pair that will keep out the fog and moisture. You will also see a big benefit from a stabilised pair.  Canon's 10 x 42 IS L pair are the ultimate.  They are built to the same standard, and with the same Image Stabilisation and Weatherproof technologies, as Canon's professional lenses. Naturally, they come with a similar price tag.

How do I set up my binoculars?

First things first.  Take them out of the box attach the strap and put it round your neck.

Take the binoculars in both hands. 

Adjust the central focus until the image is fairly clear.  If you are using them without spectacels, twist out the eyecups and adjust the hinge so that the eyecups fit your eye sockets nicely and the images from each eye merge into one.

Close your right eye, aim at a clear, well defined object such as a chimney or a road signe and adjust the focus to get the clearest possible image with your left eye.

Close your left eye and adjust the right eyepiece to produce the sharpest image.  

Open your left eye and start to see the unseen.

Which binoculars are best for Stargazing / astronomy?

A big pair!

Stars are very small to the naked eye, so you will need a pair with high magnification which means a long instrument.  Stars are also not very bright so you will need good light gathering which demands a wide front lens. 

However, a good pair of 12x50 or even 20x80 binoculars may be ideal for general purpose observation as well as pointing upwards to the night sky for a clearer view of the Moon and the constellations.

Of course, as they get bigger they both cost and weigh a lot more so a tripod can be handy to give your arms a rest.

These Skymaster 15x70 Pros with ED Glass are excellent quality and provide a good compromise between size, cost and performance.They come with a tripod adaptor in the box as well as a carry case so you can comfortably take them to the seaside next time you go.  Maybe this year, maybe 2022.....

If you don't want to bother with a tripod, the Canon 12x36 IS pair are an excellent choice.  The Image Stabilisation will be just as useful if you also use them in a Land Rover or a boat.

Whichever you choose, don’t point them at the sun.

As your choice leads you to bigger and bigger sizes, you might consider saving half the cost and weight and choose a monocular, a spotting scope, or an astro-telescope instead. If you looking through just one eye sounds a bit squinty, how about a Swarovski scope with a binocular eyepiece?

Can I get waterproof binoculars?

Absolutely. In fact, as it’s likely that you’ll be outside for the majority of time whilst using your binoculars, it would be wise to opt for ‘waterproof’ or ‘weatherproof’ binoculars anyway. Waterproof binoculars are fully sealed and gas-filled. This prevents any dust, water or other particles from getting inside and damaging the unit. The Canon 18x50, Image Stabiliser, Waterproof Binoculars are a good option if you’re looking for a sharp and steady view in harsh conditions or even marine environments. 

Which binoculars should I buy for birdwatching? 

If you’re looking to buy binoculars for birdwatching specifically, aim for a magnification in the lower range of 8x to 10x. You can achieve a much wider field of view when using binoculars with a lower magnification, which is ideal if you’re hoping to spot a fast-moving bird or animal. Binoculars with a lower magnification are also much easier to hold steady - a must unless you rest them on a support or choose a pair with image stabilisation. 

Can you clean your binoculars?

Yes. Of course you can but, to help maintain the quality of your binoculars over time, our best advice would be to clean your binoculars as sparingly as possible. This will help prevent any unnecessary damage to the lens or coating from simply using the wrong cloth material or harsh chemicals. We would highly recommend using the Zeiss Lens Cleaning Kit for the best results.  It is completely safe and includes; a microfibre cloth, grease and oil-dissolving cleaning solution, a lens brush and a dust blower.

Is Swarovski a good brand for binoculars and is it worth the money?

In the world of optics, Swarovski – without a doubt - are best known for their premium, high-precision products.  If you’re looking for a pair of binoculars that you know will maintain their quality and value over a long period of time, then we would highly recommend investing in a pair of Swarovski binoculars.  Several of us have had the thrill of visiting the factory in Austria and can vouch for the dedication and skill that goes into every pair. And we’d quite like to go again please.

How do image-stabilising binoculars work?

Canon Image stabilising (IS) binoculars use the technology developed in the lenses for their EOS  cameras. A clever bit of electronics moves an internal lens element to compensate for the external movement, or shake, of the binoculars. So, it only works if when you turn the battery on.

The 12x36 are the most popular pair under £1000 and make use of the stabilisation to give slightly more magnication than you would normally expect to be able to hold steady. The 10x42 are brighter, weatherproof and equally as popular.  Although relatively expensive, you could still buy 10,000 pairs for the price of Sir Ben Ainslee's new boat. 

The entire Canon range are good value if you are over the age of ten, looking for fine detail over any length of time, all at sea or just prefer not to either plant your elbows in the mud or carry a tripod cross-country. 

Are Compact binoculars any good?

Compact binoculars are very good, especially if you have small pockets.

8x20s or 10x26s are our most popular.

They lack the brightness of a larger pair but, with modern optics, this is not such a problem.  Indeed, the new, improved and only very slightly more expensive Steiner Blue Horizons are reactive in the same way as spectacle lenses to actually cut down the brightness.  They could be just the thing if you live on a yacht at Monaco or Bermuda, so good for people with very large pockets as well.

Of course, if you are off for a long mountain climb and not sure if it will still be foggy when you reach the summit, a compact pair in your pocket will be much better than the large pair that you left at home. If you want to go really compact, consider a monocular from Zeiss or Vortex. 

Are monoculars better than binoculars?

I am guessing that the word binocular came into use when two spyglasses were joined together and the world was looking for a better, and shorter term than ‘two-telescopes-joined-together’ or 'bitelescope’.  Although, I have to say that twinocular has a nice ring to it.

If you have one blind eye, a monocular is very good for pointing in the general direction of something that you don’t wish to see. If you don’t go by the name of H Nelson (Lord), two oculars pointing in the same direction are better to look through than just one.

Two pointing in slightly different directions will give you a serious headache quite quickly and is not so good.  So, binoculars need to be built to a high standard to be comfortable over time.  For short glimpses and taking on a walk ‘just in case’ a monocular, half the size and weight, is ideal. The Vortex Solo range are very popular.  The 8x36 RT even has images in the eyepiece that you can line up to give a fair estimate of distance.