Kính lúp Peak 1989
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1. Kính lúp Peak 1989
Kính lúp Peak 1989: magnifying glass
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).
| Magnification factor | 2.5 x |
| Auxiliary lens | 5 x |
| Lens size | 75 mm |
| 20 mm (5x) | |
| Optical characteristics | Bi-convex |
| Dimensions | 175 x 80 x 13 mm |
| Weight | 111 grams |
Kính lúp Peak 1989
