When I'm browsing photos on Flickr, I use the More Properties link quite a bit. That's the link that takes you to the Exif data associated with a photo if it's available. Embedded Exif data is how Flickr knows what type of camera took a particular photo, what the shutter speed was, aperture setting, and a bunch of other technical details about the state of the camera at the time the photo was take
![onfocus: Add Camera Images to Flickr](https://cdn-ak-scissors.b.st-hatena.com/image/square/ba253bb3045c4b3a7cf5ce0962fe0843fe441601/height=288;version=1;width=512/https%3A%2F%2Fd1x6es5xzge33k.cloudfront.net%2Ffefefd.twitter-card.png)