Kính lúp Peak 1989

This round hand-held magnifier mde by PEAK in Japan, model 1989, has a small 20 mm diameter lens cemented to the large, 75 mm diameter lens. The large lens has a magnification factor of 2.5x; the small lens a magnification factor of 5x. The excellent quality of the silicate glass lens, which is also resistant to scratching and solvents, provides a magnified image which is extremely sharp and clear.

The lens is made from optically pure white crown glass, produced using UV-absorbing crown glass; the same type of glass as used for corrective eye glasses (refractive index n= 1.52).