For Nikon owners (and I understand this also works for Sigma and Fuji), there’s a handy tool out there called IExif from Opanda. While Opanda specializes in retail EXIF reading/editing software, the basic IExif application is freeware, and you can download it from here. IExif will let you open a JPG and read it’s metadata – which in and of itself is not terribly impressive (most image editing applications will let you do that), but it will show you the stuff that most other applications will not, including all the non-documented EXIF values.Lots of this stuff is encrypted and won’t mean anything to you, unless you happen to know what 00A8 is referring to on a Nikon D200. However, it will let you see the shutter count for that image. It will only do this for JPG files unless you pay for IExifPro which can open Raw files.Opanda also has a plugin for Firefox that will let you right click on an online photograph and view its EXIF data, assuming it still has any. You can download the free Firefox plugin here
What is your cameras shutter count? | Fotohacker