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| LENS * | Specifications | Notes |
|---|---|---|
| 4x | 0.12 NA | 5:1, Focal length 32 |
| 10x | 0.25 NA; 160/0.17 | |
| 25x | 0.35 NA; 16-/0.6-1.6 | PHACO 1 (phase ring) Leitz Wetzlar |
| 40x | 0.65 NA; 160/0.17 | |
| 40x | 0.65 NA; 160/0.17 | Zeiss, 46 07 00 - 9903 |
* All objectives used in this study were low cost finite conjugate 160 mm dry lenses
