Parfocal & Centered Optics: Minimises use of the fine focusing and stage-control knobs during objective change-over Optics with Multi-layer Coating: Maximises transmission of light for crisp & bright image Illumination: Efficient light collector-lens system for optimum brightness Micron Sensitive Movements: Enables easy manipulation of specimen Options Available: With halogen or LED light source Freedom series with LED light & battery backup