Selecting an objective lens determines the field of view that can be observed at one time and the limit (spatial resolution) that can identify fine details. Also, in actual analysis, the size of the object to be measured can be divided into two cases: known and unknown. In each case, select the objective lens as follows. 1, When the size of the measurement object is knownSince the field of view and spatial resolution are decided for each objective lens, select the objective lens referring to it. 2, When the size of the measurement object is unknownAdvance measurement from low magnification to high magnification. After making a series of measurements, perform…