Assertion: newtonian telescope's mirror | /r/HasProperty | positioned
Facets:
value: between its focal point
type: LOCATION
value: between the primary mirror
type: LOCATION
Source sentences:
text: The concave tertiary mirror is positioned exactly twice as far to the side of the entering beam as was the convex secondary, and its own radius of curvature distant from the secondary.
text: The convex secondary mirror is then placed between the primary mirror and its focal point, reflecting the light back to the primary mirror but at a less steep angle.
text: The primary mirror is first positioned such that its center is under the eyepiece/focuser axis, then the primary mirror is angled so that its axis is aligned with the eyepiece/focuser.