Because it helps if someone wants to know why their picture is blurry if you can see that they shot it with a 1/2" exposure or at f/1.8. It may or may not be useful for taking pictures based on the exif (though I know I've found it helpful to know people's settings sometimes), but it is helpful in assessing more technical aspects of the critique.
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Nikon D90 | Sony NEX-3
Nikkor 18-55 | Nikkor 70-300 | Nikkor 50 f/1.4D | Lensbaby 2.0 | Nikkor 85 f/1.8D | Nikkor 105 f/2.8 VR | Sigma 10-20 f/4-5.6 | Nikkor 10.5 f/2.8 Fisheye | Sony 16 f/2.8 | Sony 18-55 | 2xSB600 | Orbis Ring Flash Adapter
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