It's imaging hardware likely from 2001 or older. Remember this space craft has been in flight for almost 10 years, in development for several years before that and the imaging hardware needs to be well tested and hardened for space flight.
Perhaps we just need some kind of infographic? If the camera is a single pixel, how many pixels away is Pluto? What's the equivalent using (as one person suggested) a iPhone camera?
It's possible that single pixel wouldn't show up at all since it's pretty dim all the way out there, but Apple has been working hard on their low-light image capture :)
And that's of course not accounting for radiation protection, a very carefully designed CCD and mounting so you can actually do science with the results, calibration after riding up on a rocket, sensitivity across 350nm to 850nm, etc.
[1] http://pluto.jhuapl.edu/soc/Pluto-Encounter/view_obs.php?ima... (actually closer to 75-80 pixels across)