es for Biological Microscope

Specification:
Magnification: 4X, 10X, 40X, 100X
Numberical Aperture(NA): 0.10, 0.25, 0.65, 1.25
Working Distance(mm): 19.37, 15.86, 0.67, 0.25
Focal Length(mm): 45, 18, 4.5, 1.8
Resolution(um): 3.35, 1.34, 0.51, 0.26
Focal Depth DF(um): 27.5, 4.4, 0.65, 0.18
Object field of view(on object, mm): 6.25, 2.5, 0.62, 0.25
Image square field of view(On image, mm): 25, 25, 25, 25
RMS M20.2

Attention:
Oil not included for the shipping safety.
It's a substitute product, NOT copy.
Standard protective packing: Special plastic bottle.