INSTRUMENTS
ASTRAL TELESCOPE
Astral telescopes are on AZIMUTHAL or EQUATORIAL tripods. EQUATORIAL tripods
are the most important for astral observation and astro-photos. The focal length ranges
from 900 mm to 1500 mm for an objective with an aperture of 60 mm to 150 mm for
REFRACTORS.
REFLECTORS usually have an aperture of 80 mm to 400 mm.
This can never be seen by a telescope
Huygens descent on Titan /Technik video
Huygens descent on Titan /Bild video
Huygens
on titan surface Titan/ video
Encyclopedie Wikipedia,
Telescope
Orders Through
French