| Place of Origin |
Jilin China (Mainland) |
| Brand Name |
JOAO |
| Model Number |
Achromatic lens |
Achromatic lens Material: Bk7 glass and ZF2(or ZF4) EFL: +/- 2% Diameter: +0, -0.18 Center thickness tolerance: +/- 0.20 Surface quality: 60-40 scratch/dig Surface precision: 5/2 x L/2 at 546.1nm Centration: 2 arc min Design wavelength: 486.1, 587.6 and 656.3mm