The main body of the microscope?

Objective lenses. Usually you will find 3 or 4 objectives on a microscope. They almost always consist of 4x, 10x, 40x and 100x powers. Combined with a 10x (most common) eyepiece objective, we get a full magnification of 40x (4x 10x), 100x, 400x and 1000x. To have good resolution at 1000x, you need a relatively sophisticated condenser microscope. The shortest lens is the lowest power, the longest is the lens with the highest power. The lenses are color-coded and if built to DIN standards, they are interchangeable between microscopes. Lenses with high lens power extend. This means that if they hit the slide, the end of the lens will push (spring up), thereby protecting the lens and slide. All quality microscopes have achromatic, parfocal, parfocal lenses.