PRODUCT
Product Description
specifications： 70/75 (mm)
Product description：
1.74 Aspheric
The higher the refractive index, the thinner lens, the lighter weight, the smaller burden on the bridge of the nose. 1.74 belongs to high refractive index product, this product is combined with high refractive index and aspheric surface design, make the product thinner and lighter. Relative to this, the price is higher.
index ：1.74
abbe value：33
specific gravity：1.46
available range：
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