Star trails
Around the Polaris region
66 minutes of the Earth rotating around its axis.
One would expect to see a 16°30’ arc (360° x 1h6m / 24h). Instrestingly, due to the camera lens’ distortion, that is not exactly the case:
Here is a video of Earth’s rotation in 66 minutes.
| Camera | Canon 400D |
| Lens | 18-55m Canon kit @ 28mm |
| Resolution | 3888 x 2592 |
| Light frames | 100, 30s @ ISO 1600 (~10s in between) |
| Dark frames | 10 |
| Bias frames | 10 |
| Flat frames | - |
| Location | Bolton, UK |
| Local time | 2020-04-21 00:13:50 - 01:19:50 |