| A | B |
| ocular | eyepiece containing the lens we look through |
| body tube | holds the lenses of the ocular and the objectives at a set distance from each other |
| revolving nosepiece | holds the objective lenses and permits them to be moved into position for viewing |
| high-power objective | contains a lens that magnifies 43X |
| low-power objective | contains a lens that magnifies 10X; |
| clips | holds the slide in place |
| stage | holds the slide; a hole in the center lets light shine through |
| diaphragm | regulates light that passes through the hole |
| mirror or lamp | reflects or shines light up through the diaphragm |
| base | supports the weight of the microscope |
| coarse adjustment knob | moves the body tube up and down; used for low-power focusing |
| fine adjustment knob | sharpens the image under high power |
| arm | supports the body tube and the adjustment; the microscope is carried by this part |
| inclination joint | permits the tilting of the body tube and attached parts |