Students in grades 1-8 will often purchase a monocular compound microscope with three objective lenses: 4x, 10x, and 40x for a total magnification of 400x.
A high-power objective lens paired with a 10x eyepiece yields a total magnification of 400x, providing you with a remarkably detailed image of the specimen in the slide.
A microscope typically has three or four objective lenses. They usually invariably include powers of 4x, 10x, 40x, and 100x. When used in conjunction with a 10x (common) eyepiece lens, the overall magnification is 40x (4x times 10x), 100x, 400x, and 1000x.
Because 40 x 10 = 400, the total magnification of this microscope using the 40x lens would be 400 times.
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