On a clear and sunny day they say that you can see for miles and miles. Of course, with the bright light of the sun as your ally, it really is easy to get...
Did You Know?
Optical glass : is used for manufacturing lenses and prisms. It is specially manufactured to be free of defects and distortion, and to withstand heat and humidity. Each type f optical glass is classified according to its refractive index and light dispersive quality. Two or more types of optical glass are typically used in the component elements of photographic lenses.