The invention relates to an adjustment joint for adjusting position, which adjustment joint (S1, S2) comprises at least two adjustment parts (S11, S12, S13, S21, S22, S23) adapted so as to be rotatable with respect to each other around (arrow R) a joint axis (A1, A2), and a locking element (S14, S15, S15a, S15b, S15c, S15d) functioning in the direction (arrow L) of said joint axis (A1, A2) for locking the adjustment parts (S11, S12, S13, S21, S22, S23) so that they become immobile with respect to each other. According to the invention, the adjustment joint (S1, S2) is adapted so as to be switched from the locked state to a fine adjustment mode by opening the locking element (S14, S15, S15a, S15b, S15c, S15d), which fine adjustment mode is arranged for preferably stepless fine adjustment of position. The adjustment joint (S1, S2) is adapted so as to be switched from the fine adjustment mode to a coarse adjustment mode by further opening the locking element (S14, S15, S15a, S15b, S15c, S15d), which coarse adjustment mode is arranged for preferably stepped coarse adjustment of position. The adjustment joint (S1, S2) is adapted so as to be switched from the coarse adjustment mode back to the fine adjustment mode and further from the fine adjustment mode to the locked state by tightening the locking element (S14, S15, S15a, S15b, S15c, S15d).