Material:BK7 and other optical lens
Size:10mm-200mm
Fringes:¦Ë/2,¦Ë/4
Center Thickness Tolerance:15mm~25mm
Dispersion Round :0.03mm¡ª0.2mm
Centration:3 arc min¡¡
Surface Quality:60¡ª40scratch and dig,80¡ª50scratch and
dig
Clear aperture:90£¥
Coating:available upon request