Optivisor Lens Plate correlations
Lens Plate Nr. Magnification Focal Length
2 1.5 20 Inches
3 1.75 14 Inches
4 2.0 10 Inches
5 2.5 8 Inches
7 2.75 6 Inches
10 3.5 4 Inches
Best regards,
Robert Lowe
Lowe Associates - Brasil
Gemstones, Rough, Specimens
Tucson - February 5 - 10, 2004 - GJX # 205