Light Exposure Calc (No ads)

You enter a film speed (or digital equivalent (ISO)) and ambient lighting conditions and this app will give you a table of apertures (f/stop) and shutter speed for the given light environment.
This table allows you to use a camera with manual control in any conditions.

The table does not account for reciprocity failure which reduces the sensitivity of film for very long exposures (this does not apply to digital sensors).