Netrium digitus, a desmid, plasma circulation, time lapse, about 500% of normal movement speed. In the huge cells of the Desmid algae plasma circulation can easily been observed. The small, circular objects moving in the cell plasma are mitrochondrions. Microscopic contrast method : Differential interference contrast. Capturing device: DSLR Canon 5DMk2 with Microscope adaption. Captured field width : 0, 17 mm. Magnification on Sensor :212x