Binoculars

Types of telescopes

binoculars

• Binoculars reduce the distance by using prismatic prisms.
• They are especially suitable for hiking, offering a wider field of view and a better look. The disadvantage is their higher weight.

Monocular (observation)

• Belongs to the category of monocular, one-eyed binoculars.
• They are telescopic and have a substantially lower weight.
• They are used, for example, in hunting or observing nature and animals.
• Not reommended for tourism- because of the rating slip distance of the observed object, The brain evaluates the distance information and based on the accurate perception of both eyes.

Extension

• It is reported in the format xx x yy, thus, for example, 16 x 32. The first number indicates the approach, the second lens diameter of the front lens in millimeters - the higher the number, the better the picture.
• For the observation of nature binoculars with a magnification of 8-12 times are ideal.
• At higher magnification, the disadvantage is a narrower field of view, a poorer contrast, and also, when one is slightly trembling, this is noticeable.

Field of vision

• Refers to the space we see with both eyes without changing the direction of view.
• Wide-angle telescopes, ie those with a large field of view, are ideally suited for sports and to observe the landscape.

Aperture

• Roughly speaking, the larger the front lens, the better the brightness (light transmittance).
• Binoculars with a higher relative opening have a clearer picture even in low light conditions - fog or twilight, etc.

Weight

• Depends on the size and type of telescope. Tourists usually choose the lightest.
• Pocket binoculars start at 200g, normal sized binoculars are around 500g and those with larger lenses weigh around 800g.

Types of lenses

• Some models feature ultra lightweight plastic lenses, but unfortunately these do not achieve the same quality of glass lenses.
• Lenses with anti-reflective glass treatment - eliminates glare, protects the lens from scratches and impervious to ultraviolet radiation. Can be identified by blue-violet color.

Housing of the telescope

• When selecting the preferred alloy, one should choose light metal or steel. Carbon casings are indeed best but more expensive.
• Avoid ones with a plastic body because the temperature changes have a very high expansion rate, which negatively affects the image quality.