What’s the difference between the “M” and “L” setting on my camera? What’s the difference in the final image between the 10 megapixel and 20 megapixel settings?
A friend recently sent me some test pictures from his new Canon PowerShot SX710. He was comparing the quality settings and sending me the results. Curiosity got the best of me and I decided to dig in myself.
These are the originals scaled down for viewing on the web. We will use some 100% crops of these for comparison. The first thing I want to do, however, is get the images out of JPEG where subsequent saves will lose information.
Then we make the crops. Since we’re only dealing with two images, I manually found the crop coordinates by visually matching features in Photoshop. Note that I resized the smaller crop to match the larger one and did so after the crop command for ImageMagick.
These were all shot at the same aperture, ISO setting, and exposure length and there’s not too much difference between the shots. The higher-quality and…
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the afterburner 