Magnification on screen

One of the most frequently asked questions about digital imaging is:

what is the total magnification showed on the screen?

To answer this question, we need to know four things:

Parfocality adjustment for upright microscopes

Parfocality is a property of the optical components that allows the microscope to stay in focus when changing between lenses of different magnification.

This means that when the objectives of a microscope are changed from higher to lower magnification or vice versa, the sample you are viewing stays in focus.

This is important especially when taking photographs or making videos using a microscope and a camera. If the parfocality is not adjusted, the camera will not be focusing correctly, even if the image seen through the eyepieces is in focus.

To ensure the correct parfocality adjustment of your microscope, just follow these easy steps:

1. Adjust the interpupillary distance so that both the right and left field of view become one.

2. Set the diopter adjustment on both eyepieces (or on eyepieces tubes) on the “0” position.

3. Select the lowest magnification objective and