Objective Lenses: Usually you will find 3 or 4 objective lenses on a microscope. They almost always consist of 4x, 10x, 40x and

**100x**powers. When coupled with a 10x (most common) eyepiece lens, total magnification is 40x (4x times 10x),**100x**,**400x**and**1000x**.In this way, how do you calculate the field diameter of a microscope?

To

**calculate**the magnification, simply multiply the ocular lens (10x) by the objective lens. With this**microscope**you can obtain four different magnifications: 40x, 100x, 400x and 1000x. The original diameters of**field**of view (**fov**) were determined with a transparent mm ruler.What does diameter of the field mean?

In fiber optics, the mode

**field diameter**(MFD)**is**an expression of distribution of the irradiance, i.e., the optical power per unit area, across the end face of a single-mode fiber.What is the field of view of a microscope at 400x?

**Field of view**is how much of your specimen or object you will be able to see through the

**microscope**. At

**40x**magnification you will be able to see 5mm. At 100x magnification you will be able to see 2mm. At 400x magnification you will be able to see 0.45mm, or 450 microns.