4X 10X 40X 100X High Quality Microscope Objective Lens Achromatic

Is Smart Device : no Theory : Biological Microscope Material : Metal Drawtube : Monocular Magnification Ratio : 500X amp; Under Brand Name : OOTDTY Origin : Mainland China Certification : NONE Mounting size : 20.2mm Material: : Precision metal core Tube length : 160mm standard thickness of cover glass : 0.17mm Type : Microscope achromatic Objective lens Magnification : 4X/10X/40X/100X Features : OOTDTY Type:Microscope achromatic Objective lens Magnification: 4X/10X/40X/100X Mounting size :20.2mm Standard RMS thread 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