AmScope 40X Plan Achromatic Microscope Objective Lens with Knurled Ring
<p>This is a 40X DIN-standard objective lens for compound microscopes. It features achromatic color-correction, and plan field-correction.</p><p> Features & Specifications: <br/>- Magnification: 40X <br/>- NA: .65 <br/>- Optical Working Distance: 0.633mm <br/>- Thread: RMS <br/>- Mechanical Tube Length: 160mm <br/>- Cover Glass Thickness:0.17mm <br/>- Color Correction: achromatic <br/>- Field Correction: plan <br/>- Immersion Medium: none <br/>- Nosecone: spring</p>