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For course focusing the primary stage is used.
Begin by using the lowest power objective lens and then switching to the next highest power lens.
scanning
What is the function of the scanning objective on the microscope? What is the function of the scanning objective on the microscope? What is the function of the scanning objective on the microscope?
For low power you can use the coarse adjustment and fine adjustment for high power you should only use the fine adjustment because on high power, the objective lens is too close to the slide and using the coarse adjustment may scratch the objective lens.
low power objective lens
Scanning Electronic microscope
course adjustment
scanning power objective lense
The scanning power objective relates to the objective lens. Most microscopes provide two or more objective lenses to give a choice of magnification power. Some also include an oil immersion lens for even greater magnification.
The magnification of the objective lens is 10x. The magnification of the scanning lens is 4x. Therefore if you are viewing an object under scanning power, the total magnification is 40x.
scanning objective