the screw forces optics holding member 68 downwardly around flexure pivot 69 this is useful in providing for a minute adjustment of the angle leading from the objective 50a to the eyepiece not shown flexure 66 fig3 is utilized to adjust the angular orientation of the objective piezomotor 52 is fixedly supported with respect to support frame 53 these motors are available from burleigh manufacturing company of fishers n y and are sold under the trademark pzt pushers they include a series of clamps which allow movement of the piezo ram in linear incremental steps of 0 02 u03bc per step clamps are ceramic elements whose annular openings vary with imposed voltage fig4 shows a three lever embodiment of the invention a unit of which can be utilized to adjust each of the objectives the piezoelectric linear motor 52 is fixed in a bottom wall of casing 75 with the motor ram 54 extending into lever cavity 75a a first flexure 76 has an end 76a held in a wall of the casing a narrowed bending link portion 79 is positioned between the fixed end 76a and a bearing 77 which abuts piezo ram 54 the outer end 78 of the flexure is positioned to abut through bearing 80 a first lever 81 mounted by flexure 82 at one end lever 81 abuts at its other end a second folded back lever 83 mounted by flexure 85 on one end and containing a bearing on its other end which abuts a.