Ramblings of an Amateur Photographer

Exposure Triangle

Exposure Triangle


I haven't posted in a while. Mainly it's due to 2 "excuses":

  1. Traveling too much. I am out taking photos or enjoying time away from the computer every chance we get. Carolyn and I enjoy getting out and doing things. We haven' been home a full weekend in at least 3 months.
  2. Working on His Light Workshops. I love watching and helping a start up grow. I am blessed to be part of such a fantastic endeavor with such great people. I have been creating a few different presentations for our next workshop. One of them is on time lapse photography / video.

While working on the presentations I went looking for the exposure triangle, but couldn't find one that was either free or use or that I liked, so I created my own.  Consider it under Creative Commons, if you like it, go ahead and use it.

The exposure triangle has been used as a learning tool as long as I can remember. It holds every bit as much value today as it ever has. To break it down you have 3 basic settings on every camera:

  1. ISO (speed of the "film" or sensitivity to light)
  2. Shutter Speed (how fast the "film" or sensor is exposed to the light)
  3. Aperture (how much light the lens lets into the camera)

The results of all this light bouncing around the camera cause several things to happen with each side of the triangle.

  1. ISO - The higher the ISO, the more noise is produced
  2. Shutter Speed - Faster: stops motion, Slower: blurs motion
  3. Aperture - Smaller (large f number): shallow depth (only a small bit is in focus) Higher (small f number): greater depth (more things in focus)

Each of these are somewhat interdependent on the other, thus the triangle.  These concepts are critical in taking well exposed images. They aren't just limited to photography, but can also be utilized for video.

Heading off to the Southwest in a little less than 2 weeks for a His Light Workshops tour. I'm really looking forward to the trip, meeting with everyone and shooting in such fantastic locations.