Focus adjustment: Coaxial coarse & fine knobs on both sides
Focusing knob can be locked for observation & transportation
Rubber cover on the fine focus knob
Condenser & diaphragm: NA1.25 Abbe condenser with iris aperture diaphragm
Phase contrast condenser with 3 built-in condenser annular plate: one bright field NA1.25 condenser, and three condenser annular plate - 10X, 40X, 100X, each can be centered individually
Stage: mechanical double layer size 5-1/2" x 5-1/2" (140mm x 140mm)
Stage x-y stroke (travel range): 3" x 2" (75mm x 50mm)