Earlier I published a post about HDEV the, High Definition Earth Viewing cameras experiment that was brought to ISS and now transmits High Definition images of Earth. It was carried in Dragons trunk to ISS. You can actually see it sitting in Dragon’s trunk when Dragon separates from Falcon-9R after the successful CRS-3 launch.
HDEV is the box that is sitting in the lower part of Dragons trunk. Looks like there is protective, but transparent cover over HDEV. You can clearly distinguish the down looking camera, it’s in the middle of the side of HDEV that is situated near the circumference of Dragon’s trunk.