Work out field of view (microscope) instantly with clear inputs, formula shown and shareable results.
Divides the eyepiece field number by the objective magnification to give the diameter of the visible field.
Field of view
Field diameter (mm) = eyepiece field number / objective magnification
On the eyepiece barrel, often as a figure such as FN 20 or 18/20.
No. Only the field number and the objective magnification determine the field diameter.