A refractor (refracting telescope) is a type of optical telescope that uses a lense as its objective to form an image.
A reflector (reflecting telescope) is an optical telescope that uses a single or combination of curved mirrors to reflect light and form an image.
The Eyepiece consists of one or more lenses. It is the last optical element of the telescope and the closest to the eye. Eyepieces feature fixed or variable zoom.
Anti-glare is a thin layer of metal applied to the lens that prevents light rays being reflected, thus reducing glare and enhancing viewing in bright conditions. Along with the lense diameter, it affects the amount of light that penetrates the optics of the binoculars.
