Originally posted by rawr Hmmm. I'm not sure. Playing around with several of those freeware tethering applications for Nikon and other brands got me thinking that perhaps the issue may very well be just at the client end, for some if not all tethering features. I'm not a programmer, but it almost looked like all that was causing some of those apps to fail was that they were looking for a Nikon identifier in the data coming back from the camera.
I can't speak for the K-x as I never bothered to try PTP / tethering with it, knowing it wasn't supported in the K-7. I did try it with the K-7 though, and when there's a PTP connection, all imaging functionality of the camera shuts down. (LCD displays all switch off, buttons all stop functioning, shutter cannot be remotely triggered with any software.)
At least, that was the case last I checked. Haven't checked again since the latest K-7 firmware update.
I think all this was covered earlier in this thread by myself and others, or perhaps in a different thread. Either way, we've been over it and the consensus is that tethering is impossible with the current K-7 firmware, leaving Eye-Fi cards as the only option.
I'd *love* to be proven wrong, though. ;-)