| Lens Format | Camera Format | Focal Length by |
| 2/3" | 1/2" | 1.37 |
| 2/3" | 1/3" | 2.00 |
| 1/2" | 1/3" | 1.45 |
2/3" format 8mm lens on
a 1/2" format camera
8mm X 1.37 = 10.96mm
The picture shown on the monitor using the above example will be the equivalent field of view of a 10.96mm lens on a 2/3" camera rather than an 8mm lens.
1/2" format 6mm lens on a
1/3" format camera.
6mm X 1.45 = 8.7mm
The picture shown on the monitor using the above example will be the equivalent field of view of a 8.7mm lens on a 1/2" camera rather than a 6mm lens.
Note: You can always trade down lenses to smaller format cameras, not up. Trading up a smaller format lens to a larger format camera will result in a "porthole effect" in the picture.
Next - Varifocal and Zoom Lenses
