Visit: http://regex.info/exif.cgi/ and http://scent.org/cgi-bin/exif.cgi
Just choose the image from your computer or URL and check the info. You can check a lot of Exif info from your image taken from shutter speed, aperture, ISO, shutter count and so on.
I have tested the first link for my Nikon D90 and it works.
Alternatively you can install a software called Opanda and check this info on your PC – http://www.opanda.com/en/iexif/download.htm