SEIMEI Telescope

The Seimei telescope is the largest telescope in the East Asian region and the first segmented telescope in Japan. The primary mirror collecting light from stars consists of 18 individual segmented mirrors, which are controlled to be in ideal positions. The segmented mirror technique enables us to get a more giant aperture telescope. Also, thanks to its light structure, Seimei quickly captures targets and contributes to the studies of time-domain astronomy, such as supernovae and superflares.
Features | Naming

Primary Mirror	3.8m (The largest in East Asia)
Focal Length	22.7m
Field of View	12'
Observable Wavelength	Visible and Near-Infrared
Pointing Time	< 1 min in the whole sky