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Objective Lens, High Refractive Index Achromatic Objective Brass 20X Chrome Plated  for Biology

<ul><li>Clearer: This lens is coated with high light transmittance, with high refractive index, and the image is brighter</li><li>Automatic Rebound: Spring device, can automatically rebound when touches the cover glass during observation to protect the lens from crushing the specimen</li><li>Brass Material: Made for brass material, fine workmanship, corrosion and fall prevention, exquisite and durable, plated accuracy material for the shell</li></ul>

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Specification: Item Type: Achromatic Objective Model: 20/0.40 Material: Brass Use: Microscope Accessories Interface Size: Approx. 20.2mm / 0.80in International Standard RMS Size Magnification: 20X Numerical Aperture: Approx. 0.40mm / 0.02in Cover Glass Applicable Thickness: Approx. 0.17mm / 0.006in Microscope Applicable Mechanical Tube Length: Approx. 160mm / 6.30in Working Distance: Approx. 0.55mm / 0.02in Common Rail Distance: Approx. 195mm / 7.68in Parfocal Distance: Approx. 45mm / 1.77in Spring: Yes Automatic Rebound Package List: 1 x Achromatic Microscope Objective1 x Storage Box

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