The causes the stage to move upward or downward. objective lens mechanical stage iris diaphragm coarse adjustment knob

The coarse adjustment knob is like the magic wand of a microscope, allowing you to quickly zoom in on your specimen by moving the stage up and down. It’s perfect for making big adjustments to get your slides in view before you fine-tune with the fine adjustment knob! When using a microscope, always start with the lowest power objective lens and the coarse adjustment knob. It’s a common mistake to jump straight to higher magnification, which can lead to crashing into the slide and damaging both the lens and the specimen. Always take it slow!