Biological Microscope Achromatic Objective Lens 20X 40X 60x 100X With Spring Standard Interface 4/5 Inch "Diameter 20.23MM |

Biological Microscope Achromatic Objective Lens 20X 40X 60x 100X With Spring Standard Interface 4/5 Inch "Diameter 20.23MM |

Precision copper core, corrosion-resistant oxidation, all-metal, imaging clear, unified standard interface, suitable for all biological microscopy! Connection thread: the international standard interface "4/5 inch * 1/36 inch", the diameter of about 20.3 * 0.705MM. 195 optical system microscope in China, the most widely used, commonly used in a variety of high and low microscope. Biological microscopy is used to observe the biological slices, biological cells, bacteria and living tissue culture, fluid precipitation observation and research, while observing other transparent or translucent objects and powder, fine particles and other objects. Used in medicine, food, health, environment and other tests. The objective lens is often expressed as "0.17" or "-". Numerical aperture using the letter NA that is an important parameter of the objective lens design, but also to determine the performance of the two important indicators of high and low. It is proportional to the resolution, magnification, inversely proportional to the working distance. In the objective lens is often expressed in numbers, such as: 0.10,0.25,0.65,1.25 and so on. The working distance is the distance from the front lens surface of the objective lens to the surface of the specimen, and is the industrial operation practical parameter.   Objective thread interface The international standard interface is "4/5 inch * 1/36 inch" diameter of about 20.3 * 0.705MM