Feature:
- Material:NK-55
- Refraction Index Nd:1.56
- Diameter:70/28mm
- Abbe Value:38
- Specific Gravity:1.28
- Available Color:Grey/Brown
High scratch resistance
35% thinner than CR-39 lens
HMC+EMI coating and UV protection
Fast darkening, fast lightening
Semi-finished or finished are available
35% thinner than CR-39 lens
HMC+EMI coating and UV protection
Fast darkening, fast lightening
Semi-finished or finished are available