Interactive exposure tool helps photographers learn the ropes


posted Tuesday, November 10, 2015 at 2:48 PM EDT


Photographer and designer Tony Catalano has created an interactive webpage that lets the user interact with shutter speed, aperture, and ISO sensitivity to see how it affects the image. You can also put the camera into shutter speed or aperture priority.

This tool is particularly useful for beginners trying to understand how exposure is affected by shutter speed, aperture, and ISO sensitivity, although it's a lot of fun for any photographer to play around with. The image that Tony has used puts a spinning fan in front of Christmas lights, which allows the user to see how changes in shutter speed and aperture affect a camera's ability to freeze action. Also, by changing the aperture, you can see the depth of field change.

By using shutter speed priority exposure mode and setting the desired shutter speed to 1/1000s, I can freeze the fan. Because it's a low-light scene, a shutter speed that fast means that the ISO sensitivity has to go all the way up to 25,600, which introduces a lot of visible noise to the image.


In this instance, I set the exposure mode to manual. By stopping the aperture down to f/8, we can see the Christmas lights in the background begin to come more into focus than in the image above.

Check it out!

(Seen via PetaPixel