>>3303135Using a light meter, obviously the shutter speed (in partnership with the aperture) dictates how much light you're letting into the camera and onto the film. In low light situations you need a longer speed, and in bright daylight you'd need a much shorter speed.
I'd recommend reading up on the exposure triangle. For film photography, the ISO is set in stone so that's one thing less to worry about - the ISO is the number in the film's name (e.g. Superia 400 is a 400 iso film).
If your camera doesn't have a light meter (a device that measures light and tells you when your settings are correct for the scene) then download a light meter application. Lux for iPhone is good, but they all work the same. In the app, you'll need to set the ISO to the same ISO as your film, pick your aperture and then point the camera at the scene. The app will tell you what shutter speed to use.
Would definitely recommend doing some reading/watching on the basic concepts of photography, as it will help you answer your own questions. Good luck!
