Apochromatic Objectives.
Reading edition
Objectives Focal length mm Numerical Aperture Micrometer Values Price $
{ 16 Dry Series { 8 { 4 16 0,30 0,015 mm 24
8 0,65 0,007 mm 32
4 0,95 0,003 mm 48 with correction collar
Homogeneous Oil-Immersion { 2 2 1,30 0,002 mm 100