O'Reilly logo

Canon EOS 40D Guide to Digital Photography by David D. Busch

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

Quality Settings

You can choose the image quality settings used by the 40D to store its files. You have three choices to make:

  • Resolution. The number of pixels captured determines the absolute resolution of the photos you shoot with your EOS 40D. Your choices range from 10 megapixels (Large or L), measuring 3,888 × 2,592 pixels; 5.3 megapixels (Medium or M), measuring 2,816 × 1,880 pixels; to 2.5 megapixels (Small or S), 1,936 × 1,288 pixels.

  • JPEG compression. To reduce the size of your image files and allow more photos to be stored on a given Compact Flash card, the 40D uses JPEG compression to squeeze the images down to a smaller size. This compacting reduces the image quality a little, so you’re offered your choice of Fine compression and ...

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