| Subject | 
has reference | 
has latitude | 
is an instance of | 
has focal ratio | 
has location | 
has altitude | 
has mounting manufacturer | 
has owner | 
has mirror maker | 
has temperature | 
has primary mirror shape | 
has mirror diameter | 
has mirror type | 
has aperture | 
has optical design | 
is a kind of | 
has comment | 
has creation date | 
has mount | 
has longitude | 
has synonym | 
has secondary mirror shape | 
has definition | 
| altazimuth telescope |   | in degrees, minutes, seconds (N or S) |   |   |   | height above sea level in meters | the person, company or institution that constructed the mounting |   |   | ambient |   |   |   |   |   | Earth based telescope |   |   | altazimuth | in degrees, minutes, seconds (E or W) |   |   | A form of mounting similar to that of a radar which allows the telescope tube to be moved horizontally (by rotation in azimuth or compass direction) and vertically (by rotation in altitude or elevation). To follow a star the telescope must be adjusted simultaneously in both axes. (also called alt-az) | 
| optical telescope | astroweb |   |   |   |   |   |   |   |   |   |   |   |   |   |   | electromagnetic telescope |   |   |   |   |   |   |   | 
| Ritchey-Chrétien |   |   |   |   |   |   |   |   | the person, company or institution that created the mirror |   | concave hyperboloid | equal to aperture (except for Schmidt which has aperture smaller than mirror diameter) | material and other engineering details | or primary mirror diameter | Ritchey-Chrétien | reflector |   |   |   |   |   | convex hyperboloid | A system of two mirrors, aspherized to give an image at the secondary (Cassegrain) focus free from spherical aberration and coma. | 
| Bol'shoi Teleskop Azimutal'nyi | astroweb | 43° 39' N | altazimuth telescope | f/4, 30 | Mount Pastukhov, Russia | 2100 m | LOMO | Special Astrophysical Obs. | LOMO | ambient | concave hyperboloid | equal to aperture (except for Schmidt which has aperture smaller than mirror diameter) | Sitall glass | 6.00 m |   |   | Primary mirror replaced in about 1984, and a third made of Sitall glass was figured in 1992 | 1975 | altazimuth | 41° 26'E | 6 m | convex hyperboloid |   |