Yup, Skysaw is right on the money.
F#dim7, Adim7, Cdim7, and Ebdim7 all contain the same notes. It's simply the bass note that defines which one of those it is you're playing.
A common dim7 shape is on the top 4 strings, as Skysaw said - you can get that exact F#dim7 voicing as follows:
E...