... 5×/18BObjective Lensf=200Working Distance190mmMagnifications for Main Microscope4×,6×,10×,16×,25×Magnifications for Assistant Microscope6×,10×,14× ... Diameter of Field58mm,38mm,23mm,14mm,9mmDiopter Adjustment±7DPupil Distance50mm~75mmMaximal Resolution119 LP/mmFocusing Range for ... Focusing Speed and Range≤2mm/s,≥50mmSpeed for X/Y and Range≤2mm/s,50mm× ...