Bushnell 4 X 21 Xtra Wide Binocular :

The Bushnell 4 X 21 Xtra Wide Binocular is the world's widest wide angle binocular. The 4x optical system delivers a field of view nealy three times as wide as standard binoculars. The fully coated optics provides superior light transmission and brightness and the large center-focus knob allows for easy, precise adjustments.

• Extra-wide rubber eyecups for long eye relief (10x 25 model)
• Non-slip rubber armor (10x 25) absorbs shock while providing a firm grip