- 7 -MT-40 Series3-3 Adjust the Focus1. Move the objective 4X to the light path.2. Observe the right eyepiece with right eye.Rotate the coarse focusing knob until the①image appears (see Fig. 10).3. Rotate the fine focusing knob③ for cleardetails.★ The position screw② can stop theobjective touching the clips.3-4 Adjust the Focusing TensionIf the handle is very heavy when focusing orthe specimen leaves the focus plane afterfocusing or the stage declines itself, pleaseadjust the tension adjustment ring① (seeFig. 11).To tighten the focusing arm, rotate thetension adjustment ring① according to thearrowhead pointed; to loosen it in the reversedirection.3-5 Adjust the Interpupillary DistanceWhen observe with two eyes, hold the base ofthe prism and rotate them around the axis untilthere is only one field of view.“。” on the eyepiece base points to① thescale of interpupillary indication, which②means the value of interpupillary distance (seeFig. 12).Range:50~76mm.Remember your interpupillary distance for★further operation.Fig. 10Fig. 11Fig12