Focus on Low Power
Begin on the lowest objective lens.
Lower the objective lens as low as it can go.
Use the coarse adjustment knob to bring the specimen
Use the fine adjustment knob to increase the sharpness
Focus on High Power
Focus on low power first.
Rotate the nosepiece to the high power objective.
Use only the fine adjustment knob.
not use the coarse adjustment knob or you may crack the
Here to Watch Stanley the Scientist Learn how to Focus
a Microscope on High Power.