5
STEINDORFF
®
2.
Focusing Controls, see figure 3
2.1.
Focusing adjustment:
Is accomplished by using the large coarse adjustment knobs located comfortably
on each side of the frame. Fine adjustment is accomplished using the smaller knobs located on the same
focus shaft. This coaxial arrangement allows for easy, precise adjustment without drift or discomfort.
2.2.
Focus Control:
Turning either of the coarse focus control knobs will raise or lower the stage. The smallest
graduation on the fine adjust knob index scale is 2μm of vertical.
2.3.
Focus Tension Adjustment:
The tension of the coarse focus is adjustable and preset at the factory for
ease of use. If you wish to adjust the coarse focus tension, first locate the tension adjustment ring. Turning
the ring toward the front of the microscope increases the tension, and toward the rear of the microscope
loosens it. Tension is too high if you experience physical discomfort.
2.4.
Pre-focusing or Focus Stop Control:
Use of this feature will insure that the short working distance
objectives don’t contact the stage or slide glass when using the microscope. Its use also simplifies
focusing. After focusing on the slide glass with the coarse adjustment, rotation of the lever toward the rear
of the microscope will set an upper limit on the coarse adjustment movement. After changing slide glass or
objectives, focusing is easily accomplished by rotating the coarse adjustment knob to reach the pre-
focused position, then making fine adjustments with the fine adjustment knob. Focusing movement with
the fine adjustment isn’t affected by using the pre-focusing lever.
3.
Diopter and Interpupillary Adjustments
3.1.
Diopter Adjustment Proper correction for
individual vision is accomplished via the diopter
adjustment located at the left eyepiece. Using the
10X objective, bring an image into focus with your
right eye only. Once the image is well focused,
observe with left eye, make fine adjustments with
the diopter adjustment ring to correct for your
vision.
3.2.
Proper interpupillary distance, or the distance
between eyepieces, is crucial to the comfort of the
user. Adjusting the interpupillary distance is
accomplished through a “folding” action of the
optical head, at Figure 4, allowing for quick and
easy adjustment.
Diopter Adjustment Ring
Figure 4
