AmScope 4X Plan Achromatic Objective Lens with Knurled Ring
<p>This is a 4X DIN-standard objective lens for compound microscopes. It features achromatic color-correction, and plan field-correction.</p><p> Features & Specifications: <br/>- Magnification: 4X <br/>- NA: .10 <br/>- Optical Working Distance: 29.04mm <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: fixed</p>