Quote Originally Posted by PhotoChief
Hello:

My name is PhotoChief. I have a new digital camera. My question is about changing ISO and what happens. ISO is like the ASA film speeds. But, you have to change film to get a higher ASA and then have to compensate for this change by changing your shutter speed or f/stop (aperture). This is not the case when you turn a knob and change the ISO in your digital camera. What happens to these factors if you change the ISO on your digital camera?

Does changing the ISO on my camera change the other exposure parameters on my camera.

Example: If I change the ISO what does this change do to the Auto and or Manual settings of my camera?

If I change the ISO what does this change do to the aperture settings or shutter speed settings?

Does changing from auto to manual change the ISO settings automatically?

Does changing the aperture settings change the ISO settings automaticall?
Well, you are showing your age calling the film speed ASA! That was kicked out in favor of ISO 25-30 years ago!

ISO on a digital camera is just like ISO of film. With film, you have to change the roll to get a different ISO. In digital, you flip the dial.

Higher ISO values make the film or sensor more sensitive to the incoming light. All the automatic modes take care of this. Manual mode, however, requires you to make the necessary changes. Just change the shutter speed and aperture in manual mode the same way you would do with higher ISO film.

Digital works just like film, just better!