When changing magnification using a parfocal microscope,focusing is performed using the coarse adjustment knob.

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Quizplus · Accepted Answer

When changing magnification using a parfocal microscope, focusing should be done using the fine adjustment knob as the microscope is designed to maintain the same focal plane across different magnifications. The coarse adjustment knob may be used to initially bring the specimen into focus, but the fine adjustment knob should be used for precise focusing.

When Changing Magnification Using a Parfocal Microscope,focusing Is Performed Using