DNT DigiMicro Mobile - Portable USB Digital Microscope 10x to 500x Magnification, 5.0 Megapixel DigiMicro Mobile User Manual

Product codes
DigiMicro Mobile
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44
Measurement 
 
Point the microscope onto a target object e.g. a ruler; 
rotate the focus wheel to get a clear focus. 
When the focus at the clearest point, take a snapshot   
3  Watch the calibration at the lower-end of the focus 
wheel; note down the magnification value that 
corresponds to the indicator marker on the 
microscope body as shown below. That value is the 
magnification at which the focus was set and the 
image taken. (This is very important, since only with 
the magnification ratio noted down can the object 
size be worked out at later steps!!)