Google's Image search engine recently started showing additional information about photos. When a search result is clicked, the landing page's sidebar now includes EXIF data: camera, settings, focal length, flash usage and exposure bias.
Google explains that the "Additional details are found from within the image file, often saved there by the digital camera that took the picture or the application that generated the image. This data can also be manually added or changed after the image has been created. Google doesn't create or change this data in images created by others. The data is saved using the Exchangeable Image File Format (EXIF) specification and can include details about the type of camera that took the image, the camera settings (like aperture, focal length, exposure length, and flash settings), and the copyright and usage rights associated with the image by the person who created or edited the image."
Another change is that you can click "more sizes" for other versions of the image and "similar images" for visually related images. The sidebar now also includes the search result's snippet.
The sidebar can also include a list of related searches, which offer a lot of information about the image and help you find similar images:
[Source:Google Support, Thanks Alex]