3 5100s ? why so many 5100s? gifts? maybe, they have not yet publicly released the C,, and just on the production camera, but stay tuned, and I would wager it will be visible soon,, if you want to update. I hook my cameras up once a year to see if any updates for the first couple of years and update the body, but after a while, don't bother getting updates. Often the updates are for features that I have no interest in.