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measuring microscopes
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The M202E electronic eyepiece micrometer is shown below mounted in our M101A microscope with a 38 mm M222 objective, 3.2X initial magnification, 45 mm working distance and 3.4 mm object field. This 32X scope can be calibrated to read 0.0001 mm or 0.00001in per division resolution. Different objective magnifications will affect the accuracy of measurement. The precision of the reading will generally be greater with an objective of higher magnification because the object will appear to be larger thus requiring more travel or turns of the micrometer screw across the object. At other times it is easier to measure with less magnification because the measurement beginning and end points are easier to recognize and appear sharper and so actual experience with the measurement is the best guide.
The following objectives are optionally available for the M101A (160mm tube length, all dimensions in mm):
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