1. of or relating to different lenses that remain in focus when interchanged
Usage: optics; photography

Examples

• The parfocal microscope objectives allow smooth magnification changes without refocusing.
• Professional cameras often use parfocal zoom lenses for video work.
• The parfocal design saves time during microscopic examination.
• These parfocal lenses maintain sharp focus throughout the zoom range.
• Laboratory microscopes benefit from parfocal objectives for efficient sample analysis.
• The photographer appreciated the parfocal telephoto lens for wildlife shots.