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Signet SRC - Trifocal 7x28 (Standard Index 1.498) 70mm Diameter Lens Blank Segment Displacement: 5mm in, 1mm down Adds are in 0.25 diopter steps from 1.50 to 3.00 Intermediate range is 50% |
| Nominal Curve | True Curve | Radius mm | SAG at 50mm | Nominal Concave | Edge Thickness | Center Thickness |
2.00 |
2.01 |
263.682 |
1.19 |
6.75 |
14.5 |
8.8 |
4.25 |
4.14 |
128.019 |
2.46 |
6.75 |
11.0 |
8.0 |
6.25 |
6.26 |
84.665 |
3.78 |
6.75 |
11.0 |
10.3 |
8.25 |
8.41 |
63.02 |
5.17 |
6.75 |
7.5 |
10.3 |
10.25 |
10.59 |
50.047 |
6.69 |
6.75 |
8.0 |
13.7 |