| Image formation by Concave Lens | |||
| Object Location | Image Location | Image Nature | Image Size |
| Infinity | At F2 | Virtual and Erect | Highly Diminished |
| Beyond Infinity and Zero | Between F1 and Optical center | Virtual and Erect | Diminished |
| Image formation by Convex Lens | |||
| Object location | Image location | Image nature | Image size |
| Infinity | At F2 | Real and Inverted | Diminished |
| Beyond 2 F1 | Between 2F2 and F2 | Real and Inverted | Diminished |
| Between 2F1 and F1 | Beyond 2F2 | Real and Inverted | Enlarged |
| At F1 | At infinity | Real and Inverted | Enlarged |
| At 2 F1 | At 2F2 | Real and Inverted | Same size |
| Between F1 and 0 | On the same side as the object | Virtual and Erect | Enlarged |