Cassegrain telescope calculator
This program calculates construction parameters for cassegrain telescopes
Choose units:
mm
inch
Choose type:
Classical Cassegrain
Dall-Kirkham
Ritchey-Chrétien
Pressmann-Camichel
Stigmatic combination
Primary mirror diameter:
Enter field:
(deg)
Primary mirror focal length:
System focal length:
Back focal length:
Distance secondary from system focus:
Distance secondary from prime focus:
Radius of curvature of secondary mirror:
Primary mirror conic constant:
Secondary mirror conic constant: