Visitors to the workshop are welcome but by appointment only.
An important consideration when buying a new binocular.
Many descriptions on the internet are confusing or misleading
especially regarding the type of glass used to make the prisms.
BaK4 is expensive, top quality, Barium Crown glass.
BAK4 is cheaper Phosphate Crown glass.
Bk7 is cheaper still but still remarkedly good for the price.