[iPhone 5 photo, thumbnail 225 x 300 px, 90% JPEG. The larger version is scaled down to 1080 x 1440 px, as close to full quality as a JPEG gets. I probably should have used Camera+ to take this, so I could save it in TIFF format; but I only just got their most recent update a few days ago, and didn’t remember to try it. That said, I would probably have put it on the server in JPEG format in any case.]
I've been pretty happy with the camera in the 5, btw, but it looks like the camera in the iPhone 6 Plus is significantly better, and I look forward to getting one at some point.