bronko22000
Consider your self it, high powered scopes like spotting scopes use mirrors and prisms for the most part normal rifle scopes are straight through,though there are a few targetor varmint rifle scopes that are an exception.
UncleNorby
If I understand your question correctly this is the answer.
scopes have a octagonal ring which is adjusted by the windage and elevation adjustments in which the cross hairs are mounted this moves the cross hairs around on the seen you see when you look through the scope. It actually works some thing like your back sight. Hope this helps. Lee