Hopefully this post has helped explain the exposure triangle photography concept in some detail.
The light triangle photography.
The three elements are.
To double the amount of light we need to double the length of the exposure.
This exposure triangle concept refers to how large or small the opening is thru the lens as you can see in the above illustration.
This opening is what controls how much or little light can pass through the camera lens and onto the camera s sensor.
For example moving from a shutter speed of 1 60 s to 1 30 s will add a stop of light because the shutter will remain open twice as long.
Aperture the size of the opening in the lens when a picture is taken.
Don t worry this isn t a geometry lesson.
The key part is controlling the amount of light and focusing the light so we get a correctly exposed and in focus image.
The exposure triangle sounds like the name of a complex spy novel but in reality this is the term used for the three fundamental elements of exposure.
Shutter speed is probably the easiest of the exposure triangle sides to understand.
Aperture shutter speed and iso.
Aperture shutter speed and iso.
It is measured in seconds.
Iso the measure of a digital camera sensor s sensitivity to light.
The depth of field is a byproduct of this concept.
I appreciate this is a fairly complex subject and it is something.
Shutter speed the amount of time that the shutter is open.