ED Glass Vs HD Glass in Binoculars
Many binocular buyers go through the confusing terminologies of glasses. Out of them, the most commonly used binocular glasses are ED and HD glass. To choose the right one, it is crucial to understand the difference between them.
In this post, I would discuss the ED glass Vs HD glass Binoculars in detail and bust any misconception associated with them.
Also, The upcoming text is essentially focused to help you understand the pros and cons of each glass.
Problems Associated With Non-ED/Non-HD Glass binoculars
For a clear understanding of ED and HD glass, it is advised to take a look at what is wrong with ordinary glass binoculars.
ED/HD glass binoculars usually sell at high prices than those made up of regular glass. The sole reason behind the pricing difference is the inefficiency of non-ED/HD glass: –
Binoculars having low-quality glass form an image surrounded by fringes. The fringing effect is known as chromatic aberrations. According to physics and optics, this phenomenon is related to the dispersion occurring at the edges of the lens.
The composition and manufacturing of glass define its ability to focus light at certain points. Ordinary lenses provide a poor focus of light that creates chromatic aberrations in the image.
All of us have seen a beautiful, crystal clear prism once in a while. Dispersion can be best understood through the example of the same prism.
A ray of white light when passed through a prism, splits into its seven constituent colors. It happens because of the difference between the wavelengths of each color.
As a result, different colors refract out of the prism at different angles.
In binocular lenses also, dispersion occurs when you see through them towards a contrasting image. E.g., if you look at a far located graffiti, then the detailing of the art will not be clear as colorful lights pop out near outlines.
Such a dispersion occurs across the edge of lenses leading to a blurry image.
What is ED glass?
The two-letter abbreviation ‘ED’ stands for extra-low dispersion. ED glasses find expertise in eliminating the chromatic aberrations caused by the lenses. In simple words, binoculars having ED glass render a clear image of better quality.
On other hand, binoculars with regular glass create an image full of colorful fringes. They also deteriorate the resolution of the image and make it hard for the viewer to focus on small details.
Meanwhile, all the credit for this clear view goes to the composition of ED glasses. Unlike regular fluorite glasses, ED glass is made up of a special compound called calcium fluoride.
What is HD glass?
Enough discussion over ED glass has been done. It is now the turn of HD glass i.e., High-Definition Glass.
This class of binoculars carries a variable meaning. Some brands and/or customers prefer them for their excellent contrast-friendly nature and exquisite lens coating.
Here, the coating of lenses enhances the anti-reflection properties thereby reducing glare.
While the exemplary qualities of HD glass binoculars hold truth, some people club HD glass binoculars with ED glass ones.
The confusion arises because of several brands that use the term HD with ED glass as ‘ED/HD binoculars’. E.g., the Vortex Razor HD binoculars contain ED glasses.
Because extra-low dispersion glasses contribute to the high-definition image quality. Consequently, several binoculars possess ED/HD as their prefixes.
On the flip side of the coin, some binoculars brands use the term HD as a marketing stunt to prove the diligence of their product.
Ultimately, many HD glass binoculars undoubtedly use ED glasses but few of them possess special coatings. This lens coating correct prism’s phase and prevents glare to provide you a bright and clear view.
ED Glass Vs HD Glass
In a Nutshell,
ED glass means Extra-low dispersion glass, In high contrast situations, this characteristic of glass controls chromatic aberration, which is actually color fringing around edges.
Thus ED glass results in high image sharpness, high resolution& high color fidelity.
HD glass means high definition glass or for some companies like Vortex, it’s high-density glass which is simply a marketing gimmick.
Consumers are already conditioned to associate the term HD with excellent picture quality as we see in high-definition TVs, so it’s being attached to binoculars.
However, HD does not always necessarily mean ED. Always look check the specifications carefully as most of the cheap binoculars also use HD glass in their specifications.
ED Glass Vs Regular Glass- Useful Video
Should You Buy an ED/HD Glass Binocular?
The present section aims to help you choose the right binocular. To do so, check the specifications of the product and pick the one that matches your needs.
The following is a list of scenarios where you might need the expertise of ED or HD glass binoculars:
- Bird Watching– From hummingbirds to cute sparrows, birds are very pleasant to watch. If you are a fan of these feathery animals, then ED glass binoculars are a good match for you. Their ability to eliminate spherical aberrations can help you notice the tiny details of colorful birdies without any fringes.
- Sporty events– For big stadium sports such as cricket and football, players’ moves might be difficult to watch. In such cases, you can trust high-definition glass binoculars. The anti-reflective coating of lenses yields a clear image despite how far your favorite player is located.
- Sightseeing– A regular ED/HD binocular is the cherry on the cake when traveling to any sightseeing location. Its perfect focus picturizes the sober beauty of nature very precisely.
ED Glass Vs HD Glass: The Final Take
The above discussion clearly signifies the similarities and/or differences between ED and HD glasses. Based on that, it is fair to say that none of them is either bad or good.
It is the requirements, brand, and specifications that matter more than the prefix of ED and HD. We hope that the above guide did calm down the war of ED vs HD glass binoculars for you.