What is ISO

FREE DOWNLOAD: A QUICK GUIDE ON HOW DIFFERENT  ISO SETTING CAN IMPACT THE OUTCOME OF THE IMAGE

 
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The same photo taken at different ISO setting can create a total different look and feel of the picture.
In simple words, ISO affects the brightness of a picture. The higher is ISO number, the brighter the image gets, but also with the brighteness comes the noise (see the illustration below).

The rule of thumb:

- on a bright sunny day you shoot in lowest ISO (100/200)

- indoors, in a shade or at dusk you increase ISO number (test your camera limits)

- ISO 400 performs well in a daytime, no matter what the forecast predicts that day

- Put your camera on a 'P' mode (Program mode) to control the ISO, the camera will take care of the rest

On the image above we've illustrated how on bright sunny day the difference in ISO setting is hardly noticable, and so it's not as critical as when shooting in the indoors or at dusk

PHOTO CHALLENGE

In order to see for yourself how ISO will impact the image on your camera/mobile phone, we suggest to do the following:

  1. Pick an indoor location at daytime

  2. Set you DSLR camera on a P mode (this way you control the ISO setting, a camera takes care of the rest), skip this step if shooting with the mobile phone camera

  3. Take 5-10 images at different ISO numbers, starting with ISO100/200 and the last at the highest ISO you get on your camera/phone

  4. View images on a screen and pay attention to the darker areas to see the difference (just like the example above)

  5. Join the community on Instagram and share your results using #FATC_photochallenge