When the cross-hairs are not clearly visible,
A)the cross-hairs should be adjusted
B)the eye-piece should be focussed
C)the objective should be focussed
D)the parallex should be removed

Question

Quizplus · Accepted Answer

When the cross-hairs are not clearly visible, the issue is typically with the eyepiece not being properly focused for the observer's vision. Adjusting the focus of the eyepiece can make the cross-hairs appear sharp and clear.

When the Cross-Hairs Are Not Clearly Visible