Microscopic Observation Lab
Explore Bacterial Cells at Different Magnifications
Use the magnification and focus controls to move from a vague blur to clear rod and coccus shapes. This virtual viewer helps practice how changing the objective and fine focus alters what you see.
Quick, visual microscope practice
Adjust magnification, then fine focus, and watch the field sharpen.
Well-focused cells
Out-of-focus blur
Field of view outline
40x
40%
At 40x with focus at 40%, you begin to see tiny shapes but they are still soft. Increase magnification and gently adjust focus until the rods and cocci come into clear view.