Sunday, July 24, 2016

Long exposure 1/2 night

Over the years I was asked what my tricks for long exposure where under certain circumstances.
It all depends on the circumstances!
First of all, the problem with long exposure is that there are neither cameras nor light meters made for this task.

In this post, I would like to cover the night-time aspect of long exposures. The content of which is also known as the 6-stop rule, converting second into minutes.

This technique involves at least a digital camera having ISO 6400.

Lets have a look at equivalent exposures shutter vs. ISO:

  • 0: 1s - 6400
  • 1: 2s - 3200
  • 2: 4s - 1600
  • 3: 8s - 800
  • 4: 15s - 400
  • 5: 30s - 200
  • 6: 60s - 100
The 6-stop rule converts seconds into minutes when using ISO100 rather than ISO6400. Why is that important? Many Astro-photographer are using ISO100 film. Therefore, a quick estimation can be made with an ISO6400 digital camera, before spending hours of waisting film.

No comments:

Post a Comment