Fundamentally, the usable resolution of a high-speed camera varies depending on the desired frames per second (fps).
As higher fps becomes necessary, the resolution inevitably decreases.
When the resolution decreases, the field of view is trimmed, causing a change in the field of view between full resolution and reduced resolution.
Even if you calculate the required lens based on the camera’s sensor size and field of view, the actual field of view may not match the calculated one if the resolution changes.
The selection of lenses should be based on the resolution required at the desired fps.
For example, lens selection for the CHU530EX.
| Shooting speed” | Resolution | Recording time (When the camera’s built-in memory is 2GB)” |
|---|---|---|
| 100 | 2592ｘ2048 | 4.0s |
| 250 | 1920×1080 | 4.1s |
| 300 | 1280×1024 | 5.4s |
| 500 | 1280×768 | 4.4s |
| 800 | 800×600 | 5.6s |
| 1000 | 640×480 | 7.0s |
| 1500 | 512×480 | 5.8s |
| 2500 | 320×240 | 11.2s |
| 4000 | 112×80 | 47.8s |
| 7500 | 320×20 | 44.7s |
If you select a 12mm lens for full resolution (sensor size: 1″),
– For shooting at 300fps, since the vertical and horizontal resolution becomes approximately 1/2, the required lens would be 25mm.
– For shooting at 1000fps, since the vertical and horizontal resolution becomes approximately 1/4, the required lens would be 50mm.
If you have any concerns or difficulties in selecting lenses, please feel free to contact us.
