![]() ![]() This will make the glasses smaller, but will also mean that they take in less light, making the image that you see through them less bright, which may be a factor in dark lit theatres. Most also have 25mm objective lenses, some with 27mm and a few that have smaller 18mm ones. It is just important to note that not all devices that use Galileo optics are designed specifically for the theatre or opera.Īs mentioned earlier, most specialist opera or theatre glasses come with a 3x magnification. On the negative side, they suffer from a reasonably high level of image blurring on the edges of the view. The advantage of this however is that because the image produced is upright, a prism is not needed and therefore the binoculars are not only cheaper to make, but are usually much more compact. This produces an upright image and rather interestingly a fairly narrow field of view. ![]() It basically means that they have a convex objective lens but a concave eyepiece. Just like some of the earliest binoculars ever made, many specialist Opera glasses use the Galilean optical design and are therefore sometimes referred to as a Galileo Binocular. It is important because a field or angle of view that is too narrow will prevent you from getting the whole stage into the view when looking through the optics. More important than the magnification is their field of view, which is basically the horizontal width of the image you can see while looking through the binoculars at a certain distance. It also means that it is easier to achieve a large or wide field of view. This is because at this level of magnification image-shake is kept to a minimum making watching the performance as comfortable and as easy as possible. Generally a magnification below 5x is recommended for an opera glass and most specialist pairs have a power of 3x. So just what makes a good theatre glass and what features do we need to look out for? Magnification For this article I will be using the terms that end in binoculars to describe standard binoculars that are also suitable to take to an indoor event and either opera or theatre glasses to describe optics specifically designed with that purpose in mind. These include Theater binoculars, Galilean binoculars, Opera Binoculars, Theatre glasses or the most popular, Opera glasses. There are a number of terms used to describe optics that are used at performance events like the opera, theatre or even the ballet. > Skip the blurb, show me the best theatre binoculars | Opera Glasses Binocular Reviews Home > Binoculars by Use > Opera Glasses
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