| Date | 1824 |
| Author | Amici |
| Contribution | Made achromatic objectives, using the Selligue approach. |
| Reference | Bradbury |
| Notes | He had made achromatics in the early years of the Century, but had been discouraged by the increased spherical aberration caused by multiple lenses. See 1827. |
| Category | Microscopy |
| Pathogen Class | General |
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