The proper position of the object can be observed by the light reflected from the entrance diaphragm using the telescope guiding facility.
(The proper position of the object; can be observed; by the light) (the light; reflected; from the entrance diaphragm) (the entrance diaphragm; using; the telescope guiding facility)
The proper position of the object the light the entrance diaphragm
can be observed reflected using
by the light
from the entrance diaphragm
the telescope guiding facility