What's a Parfocal Microscope?

Parfocal means that the microscope is binocular. ... Parfocal means that when one objective lens is in focus, then the other objectives will also be in focus.

What is parfocal and why is it important?

A parfocal lens allows for more accurate focusing at the maximum focal length, and then quick zooming back to a shorter focal length. Parfocal lenses also ameliorate lens breathing, a common headache for photographers.

Are all microscopes parfocal?

Microscopy. Parfocal microscope objectives stay in focus when magnification is changed; i.e., if the microscope is switched from a lower power objective (e.g., 10×) to a higher power objective (e.g., 40×), the object stays in focus. Most modern bright-field microscopes are parfocal.