light and shadows: the lighting on a surface causes a shadow that allows you to better see what the object is.
tonal rang: the amount of light reflecting on a surface can be measured so the tonal rang is the rang you want to keep it in.
three point lighting system: it consist of three lights the key light wich will be located 45 degeres from the odject and will be the strongest the film light is the 2nd most powerful light should be located 90 degeres from the object on the oppisite side of the key light the rim light should be placed be hind the object and is the lowst power of light
implied lighting: useing shadows to give the affect that an object you cant see is there
back lighting : the light will mainly come from the back to give a soft feeling mostly used to give a romantic feeling
silhouet lighting : lighting from behind to cast out lines in order to give a creepy atmosphere
non-key lighting: the main light source is the light bounceing off the main object uselly sets a defuse shadow
how to read a histograph: it takes the amount of pixels and rates there brightness on a scal of 0 to 255 0 is black 255 white
http://digital-photography-school.com/how-to-read-and-use-histograms/

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