The YJM62-830E telescope is a feature of our country's telescope with reference to the world’s advanced countries. According to all-day use requirements, the highly-sealed and high-performance telescope has been successfully developed. It can be used in a variety of harsh environmental conditions and has an extremely compact size and is therefore widely used. It is used in military, public security, transportation, ocean, forestry, aviation, electric power, inspection, hunting and many other fields. This is also the longest-running domestic standard telescope equipped with our military. It can be called an “entry mirror” for collectors of telescopes. .