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Used in finance, finance and taxation, philately, electronic industry to observe banknotes, stamps, stamps, coins, cards paper and printing outlets. Can accurately and quickly identify counterfeit ...

The choice of scope, the more functions the sight, the better! Cheap sights should be simpler and more practical, if 1-200 yuan of sights have any functions, basically a toy the same, what optical ...

Also known as binoculars. It is an observation instrument composed of two telescopes with the same performance that meets the requirements of people's eyes. It is a basic military observation instr...

Astronomical telescopes are divided into 3 categories: refractive, Newtonian reflective, and refractive. Refractive type: combined with several lenses, the front tube enters the light, and the refr...

The optical microscope consists of eyepieces, objective lenses, coarse focus spirals, fine focus spirals, tablet clamps, through-apertures, shutters, converters, reflectors; Stage, mirror arm, lens...

The microscope is one of mankind's greatest inventions. Before its invention, human ideas about the world around them were limited to using the naked eye, or holding lenses to help see with the nak...

A microscope is an optical instrument composed of a lens or a combination of several lenses, which is a sign that mankind has entered the atomic age. Microscopy is an instrument mainly used to magn...

Magnifying glass according to the appearance classification can be divided into portable magnifying glass and desktop magnifying glass, desktop magnifying glass is can be fixed, there is a base bel...

The number before the magnifying glass indicates the magnification, for example, 8X30 indicates that the magnification of the magnifying glass is 8x. If it is a double-rate type, separate the two n...

Telescopes originated in glasses. Humans began using glasses about 700 years ago. Around 1300 AD, Italians began to make reading glasses from convex lenses. Around 1450 AD, myopic glasses also appe...

Astronomical telescopes are the main tools for observing celestial bodies and capturing celestial information. Since Galileo Galilei made the first telescope in 1609, telescopes have continued to d...

Field binoculars and prism binoculars are smaller and can be used in the hand with binocular telescopes. They can zoom in on distant targets, so through them, distant scenes can be seen more clearl...