A Large City Called Namibia

Namibia is a largely arid country of stark rough-hewn beauty. The most vivid images are those of a haunting technicolor landscape of swirling orange dunes, shimmering mirages and treacherous dust devils. The apparent desolation is deceptive and plant and animal life and even man has adapted to this environment. The country is designed almost specially [...]

What is this part of a binocular called?

http://img265.imageshack.us/my.php?image=nikondw4.jpg
Its the part in the middle of all the arrows that says nikon on it. I just got these same binoculars and I couldnt really seem to move it all that easy. It has 2 numbers and little dots all along the right side of the wheel.
Does anyone know what this is [...]