parfocalize
/ˌpɑrˈfoʊkəˌlaɪz/
verb
- To adjust or design a lens system so that multiple lenses or focal lengths remain in focus when switching between them.
- The technician needs to parfocalize the microscope objectives so that the image stays sharp when you change magnification.
- You can parfocalize your binoculars by adjusting the diopter ring while looking at a distant object.
- Engineers parfocalize the camera zoom lens during manufacturing to ensure consistent performance.