NO.195 objectives of microscopes

Specifications:
Parameter Unit NO.195 achromatic objective
Magnification 4X 10X 20X(S) 40X(S) 60X(S) 100X(S)
Numerical aperture 0.10 0.25 0.40 0.65 0.85 1.25
The Effective work distance Mm 37.5 6.544 1.00 0.65 0.185 0.198
Conjugate distance Mm 185 185 185 185 185 185
Parfocal distance Mm 45 45 45 45 45 45
Thickness of glass Mm 0.17 0.17 0.17 0.17 0.17 0.17,