Specification of our achromatic lens as follow: *Material:BK7,ZF2,ZF7(or according to your request) *Dia.:+0/-0.05 *Center thickness tolerance:+/-0.1 *Surface quality: 60-40 Scrath/Dig *Surface figure:0.5-0.2 *Centration < 3arc min *Chamfer:0.1-0.25*45 degrees *Design wavelength:486.1mm,587.6mm,656.3mm (the parameter is dimension of normal lens,so specification will be changed according to different dimension and material).
