Subject: Achromats
Date: 2012-09-22 05:47:49
From: Lawrence Heyda

Hi Sam,

Would you happen to know what type a glass was used in the 3DWorld lenses?

The Chinese company I'm in touch with can copy those lenses--even enlarge them to 50mm-- but they would need to know what glass was used. Apparently every type of glass has different refractive qualities. Have any info on that?

KInd regards.

Larry