| Term | Description | |
|---|---|---|
| Immersion Media | The medium between lens and sample | |
| Magnification | How much larger the image appears | |
| Numerical Aperture | The lens's light-gathering power | |
| Objective Transmittance | How much light gets through | |
| Water Dipping Objective | High NA with long working distance | |
| Working Distance | The space between lens and sample |