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![165 Telescope Follows Stars (C) Tomas Danielkus](http://mao.tfai.vu.lt/media/resources/cache/100-81206d590785e3669ede55fd089120a9.gif)
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Diameter of the primary mirror (sital=cervit) |
165 cm |
Focal length of the primary mirror |
492 cm |
Focal ratio of the primary mirror |
1:3 |
Thickness of the primary mirror at the edge |
22 cm |
Diameter of the central hole |
30 cm |
Diameter of the secondary mirror |
45 cm |
Equivalent focal length of the sistem |
1968 cm |
Focal ratio of the Ritchey-Chretien system |
1:12 |
Field diameter of Richey - Chrétien |
20 cm=35' |
Field diameter |
30 mm |
Focus offset from the surface of the primary mirror |
72 cm |
Image scale |
1 cm=1,75' |
Focal reducer from |
from 1/12 to 1/4 scale 1 cm = 5.25' |
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Manuals User's guide for Molėtai observatory 1,65 m and Maksutov telescopes