Diatom circle as imaged using the low magnification objective.

Stage micrometer as imaged using the low magnification objective. Numbered lines are 0.1mm apart. The smallest line separation is 10µm.

Diatom circle as imaged using the high magnification objective.

Stage micrometer as imaged using the high magnification objective. Numbered lines are 0.1mm apart. The smallest line separation is 10µm.

Two images of fish scales as imaged using the Smith and Beck microscope. The low magnification objective was used. "Threads" are contaminating fungal hyphae.