Glossary | Binoculars | Special features
More information:
Compass
On these models, the compass display is usually shown in a small part of the field of view. A distinction is made between digital and manual versions.
ED
Lenses with special glass for high colour purity
Eyepieces for spectacle wearers
These eyepieces have a relatively large eye relief. It is possible to wear spectacles while observing and still benefit from a comfortable viewing position.
Image stabilizer
Compensates for the natural trembling of the hands. The picture is so stable, as if you were observing using a tripod.
Rangefinder
An automatic or manual feature for measuring distances.
Splash-proof
These binoculars may only be exposed to moderate moisture or light drops of water.
Threaded tripod connector
A 1/4" thread for connection to a photographic tripod. Most binoculars require an additional tripod adapter.
Watertight
Watertight optics are equipped with special seals and are gas-purged. This is usually with nitrogen or argon gas. Since these gases are heavier than air, they cannot escape.
Zoom function
The binoculars’ magnification may be variably adjusted using either a lever or a scroll-wheel.