11-16-2012 08:57 PM
I don't know any particular magic formula or numbers, but I'd assume you'd want:
Do these terms / instructions make sense for you? Let us know if not/so and we can discuss this at a level you're comfortable with so you can understand why certain settings do certain things.
Photography is understanding concepts and techniques and then applying them to infinitely variable situations as appropriate; being told what settings to use won't help you get the most out of your camera.
Hope this helps!