4X 10X 40X 100X 195 Infinity Plan Objective Lens RMS 20.2mm Microscope Objective

  

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. It's a substitute product, NOT copy. Standard protective packing: Special plastic bottle.