| Date | 1844 |
| Author | Amici |
| Contribution | Made an achromatic objective with 1/7" focal length and angular aperture of 112 degrees (equals numerical aperture of 0.83). |
| Reference | Bradbury |
| Notes | The improved performance (lack of blur and color fringes) of such lenses was a great stimulus to biological research using microscopes. |
| Category | Microscopy |
| Pathogen Class | General |
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