The total magnification being used can be evaluated using the following formula, such that:
total magnification= ocular x objective
As an example, if the ocular is 10x and the high power objective is 50x, then the total magnification, evaluated under the high power is the following:
total magnification = 10x50 = 500x
Hence, the total magnification is evaluated by multiplying the power of the objective being used and the power of the ocular. A magnification of 500x means that the image is 500 times bigger than the actual image.