UFO. Russia

Halo usually appears around the Sun or moon, sometimes around other powerful light sources such as street lights. There are many types of halos, but they are mostly caused by ice crystals in Cirrus clouds at a height of 5-10 km in the upper troposphere. The form of the observed halo depends on the shape and arrangement of crystals. Reflected and refracted by the ice crystals, the light often turns into a spectrum, which makes halo look like a rainbow, but a halo in low light has a low chroma, which is associated with the peculiarities of twilight vision.

Solid precipitation in the form of fine ice crystals floating in the air, resulting in cold weather (air temperature below -10...-15°). Day sparkle in the light of the sun, at night in the moonlight or by the light of lanterns. Often ice needles form at night beautiful glowing "pillars", coming from the lanterns up in the sky.
Occur most often during clear or cloudy the sky, sometimes fall from cirrostratus or Cirrus clouds.

The lens consists of a set of lenses (in some lenses - of mirrors), designed for mutual compensation of aberrations and assembled into a single system.

From the contour light (bright light sources behind the subject or next to it), caught in the frame or located outside the frame, parasitic reflections from the internal elements of the lens are formed, called glare (or in slang "hares").