O'Reilly logo

David Busch’s Canon® EOS M Guide to Digital Photography by Lee Sheldon

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Fixing Exposures with Histograms

Your EOS M’s histograms are a simplified display of the numbers of pixels at each of 256 brightness levels, producing an interesting mountain range effect. Although separate charts may be provided for brightness and the red, green, and blue channels, when you first start using histograms, you’ll want to concentrate on the brightness histogram.

Each vertical line in the graph represents the number of pixels in the image for each brightness value, from 0 (black) on the left to 255 (white) on the right. The vertical axis measures that number of pixels at each level. The EOS M provides a “live” histogram on the screen when using live view mode, and offers two different histogram views in playback mode when using the ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required