from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The condition of being parfocal.
Sorry, no etymologies found.
Professional-grade microscopes provide adjustments for both parfocality and parcentrality, but student - and hobbyist-grade microscopes are set at the factory and cannot be adjusted by the user.
The nosepiece of the compound trinocular microscope have a quadruple revolving nosepiece is mounted on a dustproof ball-bearing raceway with positive click stops and rubber ring for easy rotation; special system assures correct positioning of objectives for parfocality and parcentricity.
"We therefore undertook to develop a flexible c-mount adapter that would allow for motion in three axes and allow for parfocality and parcentrality while being durable.