Sell Optical BK7 and ZF2 Achromatic lenses from China |
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| *Sell Optical BK7 and ZF2 Achromatic lenses from China
Material: BK7 glass and ZF2(or ZF4) *EFL:+/-2% *Dia.:+0,-0.18 *Center thickness tolerance:+/-0.25 *Surface quality:60-40 *Surface figure:5/2 X lambda /2 at 546.1nm *Centration:2 *Design wavelength:486.1mm,587.6mm,656.3mm |
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