How to use binoculars correctly?

On a clear moonless night with binoculars observation, visible in the vast field of view is densely populated with stars, occasionally there are one or two nebulae, star clusters dotted among them, making people relaxed and happy. 

 If you’ve been using high-resolution, long focal-length telescopes in the past and don’t realize you’re missing out on much of the fun, try binoculars and you’ll be amazed by the beauty of your field of view.  Because the telescope has a wide range of uses but also has a clear and bright image, a large field of view, easy to carry, cheap, and other advantages, it is very suitable for astronomical enthusiasts to survey the sky and observe nebulae, star clusters, comets, and other planar bodies.  

So there are many varieties on the market, and their performance varies greatly.  Do you know how to use binoculars?  

Binoculars are an excellent tool for naturalists and outdoor explorers.  While simply holding them up to your eyes may bring you closer, these tips for using binoculars correctly will help you get sharper, sharper visuals.  Follow our tips and you’ll be surprised how much better you’ll notice the world around you!  

A natural landscape shot with binoculars

1. Eye distance adjustment.  

First, adjust the positive and negative diopters on the left and right eyepieces of the general telescope to 0.  Hold the left and right sides of the telescope with both hands respectively, and search for distant objects by pulling or pressing the left and right sides at the same time, so that the eye distance of the military telescope is the same as the pupil distance of the human eye (the full field of view seen by the human eye is round), and stop adjusting.  

2. Object image adjustment.  

First, search the target, lock the target, turn the left eyepiece handwheel, make the target image and partition image of the left arm system of the telescope completely clear, then turn the right eyepiece handwheel, make the target image of the right arm system completely clear, then complete the adjustment of the observed target.  Because the optical path design of military telescopes has dynamic autofocus, the telescope does not need to be refocused when the telescope’s resolution is adjusted.  

3. The focus  

All binoculars have a focusing wheel, usually in the middle, that changes the focal length of both eyepieces at the same time.  Use this wheel to refocus your binoculars each time you see a new bird.  

In addition to the focusing wheel, most binoculars also have a diopter ring, which is a smaller adjusting wheel that adjusts a single eyepiece (usually the right eyepiece).  Diopter is usually found on the eyepiece.  The diopter allows you to set up binoculars for your specific eye, you only need to set up once.  

A natural landscape shot with binoculars

Turn the diopter and focus wheel counterclockwise until they stop.  Now, cover the right eyepiece (or eyepiece with a diopter ring).  Look at the left eyepiece with your left eye and turn the focusing wheel until the mark is clear.  Make it as sharp as possible.  

Next, cover the left eyepiece and observe the sign only with the right eyepiece.  The logo can be a little blurry, so turn the diopter ring until it comes into focus.  

You have adjusted your binoculars for the difference between your eyes.  From now on, to focus, you just turn the focus wheel.  

4. Use a telescope at night.  

When the environment is dim or nighttime observation, it is recommended to use a telescope with an exit pupil diameter of more than 7mm.  Because the diameter of the pupil of a human eye is about 2 to 3mm during the day and 6 to 7mm during darkness, a telescope can collect more light than the naked eye.  

5. Look at birds with binoculars  

To find a bird, it’s best to look for movement with the naked eye to get a complete view.  Once you see a bird you want to look at more closely, don’t take your eyes off it.  Hold the binoculars near your eyes while focusing on the bird.  This will make it easier to find the bird through your binoculars.  When you see a bird, adjust your center focus by turning left and right until the bird is clear.  

6. Clean binoculars  

Whether your binoculars are cheap or expensive, they need to be cleaned regularly.  Cleaning them the wrong way can damage them.  Wiping your sleeve on your lens may seem like the easiest way to remove dust, but you may end up with many tiny scratches on the glass or lens coating.  Over time, these tiny scratches can reduce the sharpness of the image your binoculars produce.  

A natural landscape shot with binoculars

The best way to clean precious optical lenses is:  

Use a soft brush or compressed air to blow away particles (dust, dirt, gravel, debris, etc.).  

After removing the particles, moisten the lens cloth or lens paper with a cleaning solution (a solution used for coating lenses, available at camera stores and outdoor stores).  

Wipe the lenses gently with a damp cloth.  

Dry the lenses with a dry lens cloth.  

Hold your binoculars in the light and look for smudges or smudges.  Repeat wet washing as needed.  

7. Binoculars recommended:  

APEXEL mini children and adults compact folding 8×21 binoculars can be widely used, suitable for general sightseeing, opera, concerts, sporting events, close bird watching, etc, but generally used for hunting, sports, and camping.  It has the following characteristics:  

APEXEL mini children and adults compact folding 8×21 binoculars

Quick adjustment: Smooth center focus knob, an eye mask can also be adjusted, even for people with one eye prosthetic.  

Light and pocket-size: Small enough to fit in a purse, backpack pocket, or easily around the neck.  

Wide field of view and clear image: made from coated optics.  


What’s a good multiple for a telescope?  

Generally speaking, hand-held binoculars 7-10 times can, multiple too high will bring a lot of problems (imaging jitter, small field of vision, low brightness), serious brands generally will not make very high multiple!  Many Amoy brands like to mark dozens of times hundreds of times, are deceptive.  

If you can go on the tripod, the multiple can be higher, single-cylinder can do 20-70 times, double cylinder can do 20-30 times.  Note that the multiple must be matched with the aperture, simply increasing the multiple does not improve the aperture that the imaging effect is very poor.  

What caliber is better for the telescope?  

The larger the aperture of the telescope, the better the observation effect is often, but the more expensive the larger the volume, the heavier the weight, the smaller the aperture observation effect is almost, but the small size, lightweight and convenient to carry.  General hand-held choose 20-50 mm caliber of the double barrel, if the tripod, the caliber can choose 50-100 mm.  

Is a telescope single or double?  

From the observation effect, the same specifications of the double-barrel effect are much better than the single barrel, the image is full of three-dimensional sense, higher resolution, imaging bright, observation is more comfortable, but the volume weight of the single barrel is more than half smaller than the double barrel with the same specifications, the single barrel is easier to achieve high times, such as bird-watching mirror. 

Therefore, for hand-held telescopes, for better results, a double-barrel is recommended, and for lighter volume, a single barrel is recommended.  If you can go on a tripod and want to get a high multiplier effect, you recommend a single tube birdwatching mirror.  

What does a telescope’s antireflection film do?  

A telescope has multiple groups of lenses inside, each group of lenses has two reflective surfaces, if not coated with anti-reflective film, that at least 50% of the light will be consumed in the reflection of the lens surface, resulting in a serious decrease in imaging brightness, contrast, imaging fog.  So it is necessary to coat the surface of the lens with antireflective film to reduce reflection.  The most traditional anti-reflective film is a monolayer, reflective blue, commonly known as blue film. 

The anti-reflective effect of multilayer anti-reflective film is better, and more reflective green, commonly known as green film.  According to this feature, many manufacturers intentionally manufacture low-cost single-layer green reflective film, commonly known as decorative film, harmful to imaging.  You must be vigilant.  What color coating is not the key, the key to seeing whether the reflected light is weak, the weaker the reflection is lower, the better the anti-reflection effect.  

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