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 Binocular Vision and Experiment

Although both eyes are kept open to line up the pencil and the distant object, only one eye, the dominant eye, is used to determine the alignment. When this eye is closed, the pencil will appear to 'jump' sideways. It is closure of the dominant eye which produces the jump because, according to the eye now remaining open, the pencil and distant object are not in line. If the student is slow to line up the two objects he or she may be aware of a double image of the near object. Nevertheless, the student is still likely to select the image from the dominant eye.

Keep both eyes open and hold a pen or pencil upright at arm's length.
Quickly move the pencil to come exactly in line with a more distant vertical object, such as a window frame or lamp-post.
Close and open the left eye.
Close and open the right eye.
Note any change in the apparent position of the pencil and whether it was the closure of the left or right eye which produced it.
Which eye did you use in lining up the two objects?
Place a glass marble on a non-slippery surface, e.g. on the page of an open notebook.
Cross the first and second fingers of one hand and press on the marble with the tips of these fingers.
Close your eyes and roll the marble firmly, forwards and backwards, side to side and then with a circular motion for about 30 seconds.
Notice any unusual impressions you receive from the fingers.

Source: Compact Porro Binoculars,    Monocular Telescope

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 Hunting Spotting Scopes and Binoculars

As you can clearly see, these scopes can be of use to virtually anyone that enjoys the finer side of nature. View the skies, look at the avian life or scope out your prey on your next hunting trip. Whatever it is you plan to do with your spotting scopes, you can be sure that it will be much more convenient than doing the same with a telescope. If you're ready to experience a great view of the world, then you're ready to look into hunting spotting scopes.In addition to hunting you might also use your spotting scopes to watch for birds. There are still many bird watchers out there, all of them keen on identifying new birds, or birds that have migrated into the area. Using these spotting scopes you will be able to take a look at the avian wildlife and take your notes accordingly.

There are three numbers printed on any scope and those numbers have a particular meaning. The first two numbers are a representation of the magnification. The third number is the diameter of the lens, the most common diameter being about 50mm. You will find that a larger diameter provides you with a larger viewing area.Spotting scopes are typically refractors save for a few, and refraction involves the use of prisms. These prisms turn the image right side up and correct it properly, and there are two types of prisms in use today. First we will talk about the porro prism, and these are very popular simply because they are easy to produce and cheap to purchase. Roof prisms are a bit more portable and they are much more expensive. They also provide a higher quality which makes the ownership of these devices something that only the most elite of hunters and spotters will enjoy.

Source: Compact Porro Binoculars,    Monocular Telescope

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 Marine Binocular Prism Types&Additional Features

There are two primary types of prisms used in all binoculars. The most common is the Porro prism. This type uses offset prisms to increase the image your binoculars can see in a compact design. Inside the binocular the image is inverted and then re-oriented to be right side up. Meanwhile, the path that light travels down inside the binocular is increased so you get a clearer image. The roof prism is a more compact and heavier design, resulting in long, straight binoculars. The roof prism marine binocular is durable, heavy binocular that delivers a clear image, but for similar quality viewing it is more expensive than the Porro prism style.

Now let's get to the features that make binoculars stand out from the pack. First, waterproofing is an absolute essential; field binoculars that are not waterproof will probably be ruined at their first appearance on board your boat. Second, lens coatings that provide protection against fog and moisture are worth their weight in gold. Look for marine binoculars that are o-ring sealed to keep out condensation.Image stabilization is also a huge advantage in a binocular. This is usually done with gyro-stabilizing techniques (also used in cameras, camcorders and military binoculars) to compensate for shaky lenses even when you are bobbing up and down on the waves.Additional features in marine binoculars include optional extras such as a compass and or a rangefinder. Even if you have GPS on board, a traditional built-in compass is a quick reference that is always handy and a rangefinder gives you a mechanism for quickly estimating the size of an object in the distance.

Source: Big Porro Binoculars,   Monocular Telescope

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 Something:My New Binoculars

Today's binoculars are so much better in so many ways. The Audubon Equinox HP is smaller, 5.8 inches by 5.1 inches and weighs only 23.6 ounces. To top that, the magnification is a full power higher (8x) and the objective lens is smaller (42mm), but the field of view is comparable at 336 feet at 1000 yards. The Stokes DLS 8 x 42 has a field of view of 383 feet (same as those old Manons) but are 5.5 inches by 4.875 inches and only weigh 26 ounces. Both of these newer binoculars are using the more modern optical technology, roof prisms.Roof prisms have several advantages over the porro prisms. One is the newer binoculars are more ergonomic and feel more comfortable in hand. Roof prisms allow for internal focusing which is very important. Internal focusing means that a binocular can be waterproofed and fog proofed easily. Both the Equinox HP and the DLS are Nitrogen purged so one does not have to worry about being in the field in rainy, moist conditions.

Another advantage of today's binoculars is the ability to close focus. The DLS has a close focus of 4.5 feet, making them wonderful instruments for those interested in butterflies as well as birds and other wildlife. I wouldn't even dream of trying to view butterflies close up with the Manons; I'm afraid it is just an exercise in futility.I stare with fondness at Dad's gift, but I carry those newer binoculars to the field. The images and detail I now observe are so much better. Had I possessed today's binoculars when I was a boy, I might have learned to identify much more quickly. Technological advances have their day, and we should be glad for it.

Source: Big Porro Binoculars,   Monocular Telescope

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 military and hunting:Night Vision Binoculars

Night optics is often used in military campaigns and in hunting activities. High-powered guns are often fitted with rifle scopes to help the soldier or the hunter in accurately shooting their targets. Additional equipment such as night vision goggles, monocular, and vision scopes are also used in conjunction with binoculars. NVDs (night vision devices) in general have become widely available to the general public due to the development of new technology which has made its manufacture and distribution cheap and affordable to the public.Rescue and law enforcement operations - firemen, policemen, and rescue personnel are now able to perform rescue operations in total darkness thanks to NVD technology. Law enforcement teams such as SWAT and border patrol agents have also made use of this technology to capture criminals and illegal immigrants.

There are many uses of products equipped with such capabilities and aside from hunting and military use, NVDs can be used for:

Scientific study - nocturnal creatures such as the night owl, bats, flying squirrels, and lemurs can now be observed by scientists discreetly using cameras equipped with night vision.

Navigation - sailing at night can especially be dangerous. River rafting or boating, or just generally being out on the water on a moonless night can be hazardous if you have no way of seeing the way in front of you. With night vision technology, sailors and helmsmen can now navigate their way in the dark.

Security - security cameras are often equipped with such features so it can see in the dark. Some guards in high-security facilities are also given scopes that come equipped with such capability to see in the dark.

Recreation - there are now cheap binoculars night vision being sold purely for recreation, as toys, as simple gadgets for hobbyists, as add-ins and extra features in video cameras and cameras in general; the recreational uses of night vision devices are many and limited only by one's imagination. Night optics has also been proven an invaluable tool for campers and specifically for spelunkers, who often go around in caves that are totally pitch-black in darkness.

Source:  Promotional Binoculars,   Monocular Telescope

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 Using Binoculars:Quality

We all get to the point that we may want to enjoy the outdoors and do some outdoor activities which would in turn become entirely useful to us. Quality used binoculars coming from the professionals who have their reasons for selling is a good deal after checking out the condition of the item. The usual reasons for selling them is upgrading or lack of use and need for funds. If you are offered quality used binoculars at a good price, just buy it and keep it. You will never know when it will come in handy.In this world where everyone seems to be saving on additional expenses, trying out quality use binoculars may be an economical solution to people who want to own quality binoculars today. There are a lot of binocular brands that people look for today and among them include that of Vivitar Binoculars, Swarovski Binoculars or even the highly touted Nikon Monarch Binoculars. A quality used binoculars set will from any of these product lines will surely be something and people may do well to check them out before making any hasty decisions.

Also, there are new types of quality used binoculars offered in the market today such as that of binoculars with digital camera where people can capture the whole image and view from afar. This is quite a rare line of binocular type and finding them in quality used binoculars offered for sale at a lower price will surely be sold fast.Some people are just aware and cautious on the type of spending they can make and we all know that brand new binoculars are something they can very well do without. However, if such a deal would be offered on the table, chances are you may want to check it out since getting a steal from good quality used binoculars is not something you will encounter everyday.

Source: Promotional Binoculars,   Monocular Telescope

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 Monocular Vision Equipments & Invention of telescope

In the early 17th century, the Dutch invented the telescope first. By the Dutch invented the telescope is not accidental, as when grinding glass and precious stones in the Netherlands, technology is developed, the glasses will make a lot of workers. On this day, the sun shines, the birds singing in the air, flying children. Fort Scimitar in the Netherlands town of Libby Stauch mirror to check the workers out of the lens grinding quality lenses to see the church on top of the weathervane. At that time, he took a piece of convex and concave. When he put two lenses arranged in a line to leave a little surprised to see the distant large and near the vane. He was so excited and immediately to see farther thought to produce better devices. In the fall of 1608, Libby Stauch produce such a device, later known as the Dutch telescope. Is to a convex lens and a concave lens mounted on both ends of a tube, one end of eyes mounted concave lens. December, he made a pair of binoculars.

One of the most special products in the market is those of monocular vision equipment. This enables individuals to have the advantage of seeing a distant object with clarity. There are several visual equipment products that would be able to serve great purposes, whether in sports, leisure or personal use. These would include such items as binoculars, monocular, scopes and goggles.The advantage that goggles have over others is the fact that it comes with a headpiece that would fit around your head and would not need to be held as used. It would be in a stable position while it serves its purpose and would also provide you with the efficiency of making sure that it stays where it is supposed to be focused - it moves as you move. Binoculars are also great items to use. It provides you the ability to use both your eyes to focus on what you need to see. Monocular on the other hand are great for any individual who prefers it as it is used no differently as a telescope. The great thing about monocular vision equipment is that it will allow individuals who have eye problems to focus using their good eye. This means that if one eye has impairment or has a higher-grade requirement, they would be able to use the eye that has better visual ability without using glasses or the like. Finally, we have the scopes. These are great especially when it is used during hunting as it can be attached on to the rifle. As you wait for your target, you can use this without the need to change your position or move differently once your target comes to place.

The great thing about visual equipment is that it has also moved with the turn of technology. There are countless models and brands for this equipment that are featured with night vision technology. This means that it can now be used in the dark and those individuals or enthusiasts would be able to continue with their tasks and activities regardless of the lighting condition. The best way to learn more about specific products is by means of seeking the opinion of reviews and the like that would divulge the most demanded pieces of information. In these reviews, you would be able to find a rundown of advantages of the product in question. You would also find probably disadvantages that would serve as beneficial information for your decision.

Source: Monocular Telescope   Telescope

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 Buying Coated Lens Binoculars

Telescope is an electromagnetic wave through the collection of instruments to observe distant objects. In daily life, the telescope mainly refers to optical telescopes. But in the modern astronomy, telescopes, including a radio telescope, infrared telescopes, X-ray and Gamma-ray telescope. In recent years the concept of astronomical telescopes and further extended to the gravitational waves, cosmic rays and dark matter fields.

You finally decide to get yourself a trusty pair, and that means going to your local sporting goods store. However, with all the choices that we now have, having to choose the right pair can really do a number on you, which is why knowing what a good pair of coated lens binoculars looks like is a must, even before you step inside the store.If you are an avid outdoorsman then you probably know what binoculars are for, and more importantly, how they work. Basically, binoculars are two identical telescopes aligned to accurately point to one direction to accommodate both eyes, and its primary purpose is to allow the user to view distant objects that one cannot otherwise see with normal vision. Binoculars are made up of a series of curved lenses that refract and reflect light, and unlike monocular telescopes, they give the user a three-dimensional image.

When choosing coated lens binoculars you must look at a variety of factors, like the magnification, prism types, field of view, focusing specifications, and of course, lens coatings. Most binoculars used by hunters, bird watchers, and of course the military, now come with coated lenses, since lens coatings extend the life of the lenses, protect it from scratches and other types of damage, and can provide the user with clearer, brighter, and sharper images.You must consider the specific activities for which you'll be using your binoculars. If you are an avid bird watcher, birding binoculars are what you should get. A key feature in looking for birding binoculars is stabilization, since you would want the least amount of shake if you want to capture that bird and keep in sight.Hunting binoculars offer a greater range finder feature. Look for binoculars that also allow you to accurately gauge the distance between yourself and your object. For marine binoculars, the most important feature that you should look for is a durable and waterproof design.

The type of binoculars you choose and the specifications will directly affect the cost of your binoculars. Coated lens binoculars are no longer as expensive as they were before, but depending on the type of coating, prices for binoculars will vary. Coated lens binoculars come in three general types: fully-coated, multi-coated, and fully multi-coated. Magnesium fluoride is often the most common coating material used, although some companies like Fijunon use zinc oxide in their binoculars for sharper images, at a slightly higher price. If you want to purchase binoculars that will give you the sharpest images possible, go for pairs that have full multiple coated lenses, since these offer the maximum light allowance, compared to fully coated lenses that are only a step above having non-coated lenses when it comes to light transmission. If you want to use your binoculars for some serious outdoor adventures, never go for discount pairs since they tend to come with poor quality lenses, have a more restricted field of vision, and are often less durable than higher end models.

Source: Monocular Telescope  Telescope

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