- Smooth focus operation: New focus rack with ball bearing and coaxial coarse and fine focusing for stable, precise adjustments. - Compatible mounting footprint: Annular ring holds a microscope head with a diameter of 50 mm; stand post (arbor) opening diameter is 25 mm. - Precise travel and readouts: Working stroke 50 mm; center distance 156 mm; fine focusing scale 0.002 mm per division; rotating one circle moves the stage 0.4 mm up or down. - Practical and portable design: Professional and practical construction with an attractive appearance; easy to carry and use. Typical applications - Classroom or teaching labs: smooth, repeatable focusing during demonstrations and student experiments. - Research or clinical settings: precise micro-adjustments of microscope heads or optical components for alignment and measurement. - Field, workshop, or studio use: portable, accurate positioning for slide work, optics alignment, or camera/macro photography setup.