The 7-21X40 provide a field of view that is nearly twice as wide as conventional binoculars.Comfortable viewing.It's extra Wide Binoculars, perfect for spectator sports and theater or concert enthusiasts who want to see all of the action without constant movement.With compact body,light weight,very easy to carry for outdoor use.and it with full multi-coated green lens and Bak4 prisms for light transmission, so it has high resolution and good field of view. It also has rubber armored body for durable use.The most import is it with super big lens.
Specifications:
• Magnification 7x
• Caliber 50
• Prism System Roof
• Prism Glass BAK4
• Focus System Center
• Field Of View(m/1000m) 330
• Exit Pupil 4.2mm
• Waterproof Yes
• Fogproof Yes
• Nitrogen Filled Yes
• Eye relief 18mm
• Coating FMC-Green
• Close focus 3m
Features:
• Super big ocular lens for comfortable viewing
• Durable and Protective, Rubber-armored
• Fully multicoated glass lenses deliver the ultimate brightness and resolution
• BaK-4 prisms offer the clear, bright and crisp images
• Long eye relief for eyeglasses wearers
• Smooth Central Focus Knob for quick viewing
• Nitrogen filled and O-ring sealed for Waterproof/Fogproof
• Extra Wide Binoculars
Note:
1 Do not directly observe the strong light source such as the sun.
2 Do not use the mouth blown the lens to avoid saliva corrosion lens.
3 Do not touch the lens avoid contact with grease and fingerprints.
4 Do not put the telescope in the high-temperature closed space to avoid fire or explosion.