AOTO 4X 10X 40X 100X High Quality Microscope Objective Lens Achromatic Objective Laboratory Biological Microscope parts

4X 10X 40X 100X High Quality Microscope Objective Lens Achromatic Objective Laboratory Biological Microscope parts Features : Type:Microscope achromatic Objective lens Magnification: 4X/10X/40X/100X Mounting size :20.2mm Standard RMS thread Material:Precision Copper core Tube length : 160mm standard thickness of cover glass 0.17mm for Biological microscope Detailed information : 4X :Numerical Aperture (NA) 0.1; working distance 18mm 10X: Numerical Aperture (NA) 0.25; working distance 7mm 40X : Numerical Aperture (NA) 0.65;working distance 0.53mm 100X :Numerical Aperture (NA) 1.25 ;working distance 0.13mm