help pls in mzulft looking for staff of magus/ stuck at trying to place a crystal in ctr of globe in observatory any one have idea thanks ahead of time old fossil again

You can read the following page for instructions on focusing the crystal: http://www.uesp.net/wiki/Skyrim:Revealing_the_Unseen#Focus_is_the_Key

On this page click "show" where it says "Puzzle Solution."