Category: Observations and pictures


Bee claw (tarsus)

Animated GIF of the leg of a honey bee (tarsus)

Focus animation of the leg of a bee.

Testing the iPad camera

The two images show the fresh water polyp Hydra sp taken with the iPad held in front of the eyepiece (40x and 400x total magnification). The images were uploaded directly and not edited (except resize).

fly wing

Wing of a Fly

The wing of flies and bees (of hymenoptera in general) are thin and membranous. Place the dry wing into Euparal mounting medium and place a further drop on top of the wing, before adding the cover glass. Wet mounts should also work well. Notice the veins and the numerous small hair, which cover the wing.

Chicken feather

Bird Feathers

Bird feathers are relatively easy specimens to observe.

Dandelion pollen in dark-field

The pollen grains from a dandelion (Taraxacum sp.) were collected and air-mounted (no liquid mounting medium used). Eleven separate images were stacked together to increase the depth of field and to produce the final image. The color contrast was then adjusted. Dark-field patch stop was used.

blood frog 1

Blood cells of a Frog and of a Human

The red blood cells of amphibians contain contain a nucleus, which is visible as a dark purple dot in the center of each cell. In contrast, the red blood cells of mammals do not possess a nucleus.

Potato starch grains in dark field.

Starch grains of a Potato

The pink oval structures are potato starch grains. One of the easiest and fastest way to observe starch grains is to scratch some sample off the surface of a potato with a sharp object and then adding some diluted iodine solution. Further Reading

tulip epidermis

Epidermis of a Tulip showing Stomates

Stomates are the openings in a plant leaf, which allow for the diffusion of gasses.

algae, bacteria


How to make macro images

This time I’d like to talk about a topic which is only indirectly related to microscopy: macro imaging.

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