Achromatic Microscope Target Silver 4X Len Objective Microscope With Standard 20.2mm Interface Feature:1. High Light Transmittance and Refractive Index: The lens is coated, has high light transmittance and high refractive index, making the image brighter and clearer2. Standard and universal: The screw interface size is the international standard RMS size, which can be used by 95% of professional biological microscopes on the market3. High-quality brass material: Made of brass material with exquisite workmanship, this purpose is corrosion-resistant, can not worry about falling4. Chrome plating: the target coating is chrome-plated, which is wear-resistant, stable and durable, can be used for a long time5. Application: this microscope target as an important fit for microscopes in the laboratory, mainly used for microscope magnification for object observationSpecification:Item Type: Achromatic Microscope Target Material: BrassModel: 4/0.10Application: Microscope AccessoriesInterface Size: Approx. 20.2mm/0.8in (International Standard RMS Size)Magnification: 4XPnumerical Tube: Approx. 0.10mmGlass Case Thickness: Approx. 0.17mm Microscope Suitable Mechanical Tube Length: Approx. 160mm/6. 3inWorking Distance: Approx. 0.13mmCommon Rail Distance: Approx. 195mm/7.7inParfocal Distance: Approx. 45mm/1.8inPackage List:1 x Achromatic Microscope1 x Storage BottleHow to Use:1. Can be used when connected to the microscope.2. In order to facilitate observation, it is recommended to start observing at low magnification, because it is more difficult to adjust high magnification than at low magnification, according to the characteristics of the observed sample, not all patches are suitable for observation at high magnification.