FORT LOGAN - HOW IT WAS MADE
In the above example the street lights were far
away enough that I knew I could make exposures in the 30 second to the
5 minute range without the streetlights in the bottom of the picture
changing the look of the photo very much. Also because it was well after
dark I knew there was no danger of ambient light in the sky overexposing
the film. I opened my lens aperture to f/4 hoping to record highly detailed
lightning strikes. Then I simply opened the shutter until I saw one
or two lightning strikes in the area where I had pointed my camera,
then I closed the shutter and went on to expose the next frame of film.
I was able to make a series of images, most of which had an acceptable
range of exposure.