When applying lens to see the sample surface area to view the resolution (by instrumentation OM) in which the value of the resolution of the surface area of the sample, there are clearly differences in lens.
When a sample lens surface area to check to check the resolution (without instrumentation. OM) is the definition of the surface area of the sample lens is a clear distinction.
The sample lens to check the surface area to check the resolution (by a measuring instrument OM) which the value of the resolution of the surface area of the sample lens is different obviously.