FMC coating; SV407 super wide binocular is the real FMC objective lens; the center is clean and sharp; you can observe entire constellations and star fields and the stars are brighter and clearer more than just with the naked eye Wide angle; a 26-degree view of the field is like walking in space; looking through SV407 binoculars shows you complete constellations with a 26°field of view; you can observe not just the main stars in a constellation but many you have probably never even seen before The long depth of field design; it almost seems as if you are standing on a very high mountain in absolute darkness; from the recent focus distance to infinity; no need to twist the eyepiece frame to focus and operation portable With a magnification of 2.1 times; you are seeing objects about twice as large as with the naked eye; the lenses used ensure that a large amount of light enters the eyes; it is also very suitable for watching dramas in small and medium theaters; art appreciation; exhibition halls Finely crafted; fine workmanship; exquisite appearance; easy to carry; the objective lens has a standard 2-inch filter thread; which works better with a light-astronomical astronomical filter