That would be a Planck time, but 1) we can't measure with a precision anywhere remotely close to that, and 2) if we could time things that finely, we couldn't take a photograph of it because there isn't enough time for the photons to hit your receptor. For perspective, this photo took more than a decillion Planck times.

(Disclaimer: I'm not a physicist of any sort, but I'm pretty sure this is all right.)