POWERFUL BIG EYEPIECE BINOCULARS: With large caliber producing large field of view, it provides you with comfortable sight. With 20mm objective lens diameter, it has high magnification 10X, gives you close focusing distance and pretty high...

42mm objective lens diameter367 feet wide apparent field of viewHigh-reflectivity silver-alloy mirror coatingLead and arsenic-free Eco glass materialTurn and slide rubber eyecups wit multi-clickNitrogen filled waterproof and fog-free...