Here is a small collection of “cheat sheets” that I collected from the internet. (The respective sources are always indicated on the images.) They are about the same concepts that we have talked about but it’s always useful to find as many visualizations for a given problem as possible. You never know which image will suddenly start making sense for you.
Aperture (f-stop) and depth-of-field:
Metering (without a meter):
Metering at night:
White balance (color temperature):
Color temperatures (in Kelvins):