Magnification of all photos: 200×
Habitat: muddy water and water squeezed from Sphagnum in a swamp. Associated plants: Carex cf. nigra
Photo taken with a Celestron PentaView Digital Microscope. According to their website, the FOV (i.e. the diagonal width) at 200× is 300 µm.
400X
Eyepiece magnification: 10X
Field Number: 18MM
Sample of river water collected at the shore