Professional Binoculars10X power magnification and 50mm large objective lens,416ft/1000yds,excellent performance, weighs 2.65 lb,field of view designed to enable you to observe target from 1000 yards away with more true-to-life details,Perfect for Bird watching.This 10x50 powerful binoculars for adults also can be used for watching large stage play, vocal concert, football game,Hunting etc. Easy to Focus Binoculars It is equipped with a convenient central focus knob and adjustable right eyepiece to adapt to different viewing distances. Corrective optical coating are good for color fidelity and minimize distortion. Diopter System adjusting the imbalance vision of both eyes. Leniency center focus knob makes it easy to focus for fast moving.HD Vision with Quality Optics Premium BAK4 Prism and FMC Broadband coating lenses deliver 99.5% total light transmission for a guaranteed brighter view, makes you have a amazing experience. The low-light feature also ensures a clear view towards dusk but not in complete darkness, Perfect for Hunting or Concerts at night.Adjustable Eye ReliefTwist up and down eye cups to adjust the most suitable distance between your eyes and the optical lens. Enjoy comfortable viewing even you are a eyeglasses wearers. IPX6 Nitrogen-Filled Waterproof with a fog resistant coating and O-ring sealed optics prevent moisture, dust and debris to keep it clear all the time.